1. In Appert v. Brownsville Co. (C. C.) 144 Fed. 117, and in Schmertz Wire-Glass Co. v. Pittsburgh Plate Glass Co. (C. C.) 168 Fed. 73, the history of the issuance of the Schmertz patents in obedience to an order of the Circuit Court for the Western District of Pennsylvania in a proceeding under section 4915, Rev. St. (U. S. Comp. St. 1901, p. 3392), is given. Appellant, a stranger to the proceeding and not entering the wire-glass field until a considerable time after the patents were issued, contends that irregularities, and alleged omissions in procedure, and collusion between parties resulting in imposition on the court, render the order and the consequent issuance of the patents void. Circuit Judge Buffington, who made the order, has found against the contention twice. In the record before us we are inclined to think there is nothing that should lead us to find otherwise. But we do not rest upon this ground, for -we believe that appellant is not entitled to present the assignment. Gandy v. Marble, 122 U. S. 432, 7 Sup. Ct. 1290, 30 L. Ed. 1223, decides that a proceeding under section 4915 “is in fact and necessarily a part of the application for a patent.” A patent is the government’s signed and sealed grant of a monopoly. Under the Constitution, Congress could have provided for the grant of monopolies to inventors against which the-citizen could set up no defenses. Congress named certain permissible defenses, of which fraud and collusion in following the application to issuance is not one. Therefore a patent procured by fraud and collusion or by illegal procedure can be attacked only by the government. Mowry v. Whitney, 14 Wall. 439, 20 L. Ed. 858; Mahn v. Harwood, 112 U. S. 354, 5 Sup. Ct. 174, 6 Sup. Ct. 451, 28 L. Ed. 665; Ry. Register Mfg. Co. v. North Hudson C. R. Co. (C. C.) 23 Fed. 593; U. S. v. Am. Bell Telephone Co., 128 U. S. 315, 9 Sup. Ct. 90, 32 L. Ed. 450 ; Id., 159 U. S. 555, 16 Sup. Ct. 69, 40 L. Ed. 255; Id., 167 U. S. 224, 17 Sup. Ct. 809, 42 L. Ed. 144.
-2. In the course of the interference proceedings Appert was awarded priority twice; Schmertz, three times. Since the Schmertz patents issued, the defense that Appert was prior has been made in court at least six times, and there has never been a denial of Schmertz’s priority. Even if it -were permissible to ascribe to Appert an earlier date than January 12, 1894, when his French patent issued (section -1-923 [page 3396] ; Parker v. Appert, 75 Off. Gaz. 1201), appellant would fail. The evidence satisfies us that in the summer of 1893 Schmertz had fully conceived, made drawings of, and disclosed, his invention. This was before Appert ever thought of the matter, so far as the record shows. Prior to January 12, 1891, Schmertz was engaged in making a machine with which to practice his invention, and on January 16, 1894, he produced merchantable wire glass.
3. There is a distinction between abandonment of an invention and abandonment of an application. Western Electric Co. v. Sperry Co., 58 Fed. 186, 7 C. C. A. 164. Abandonment of the invention was not pleaded. Abandonment of an invention being a question of intent (International Co. v. Kellogg Co., 171 Fed. 651, 96 C. C. A. 395), appellant, if it had pleaded the defense, would have had the burden of proving clearly that Schmertz and his successors in interest had *792such an intent. Nothing in the record satisfies us that the defense could be maintained.
The question of abandonment of an application arises under section 4.894 (page 3384), which provides that a failure to prosecute an application within two years after any action thereon shall be regarded as an abandonment of the application “unless it be shown to the satisfaction of the Commissioner of Patents that such delay was unavoidable.” In a proceeding under section 4915 the exception would mean “unless it be shown to the satisfaction of the Circuit Court having the matter in charge that such delay was unavoidable.” Appellant insists that the delay for more than two years in the Circuit Court for the Western District of Pennsylvania was not unavoidable. To present such a contention collaterally constitutes a kind of attack upon the validity of the patent, which, for reasons already stated, cannot be permitted. The review of the question of abandonment of an application in Gandy v. Marble, 122 U. S. 432, 7 Sup. Ct. 1290, 30 L. Ed. 1223, was on a direct appeal in a proceeding under section 4915.
4. Prior practice, patents and publications are, quite elaborately discussed in Schmertz Wire-Glass Co. v. Pittsburgh Plate Glass Co. (C. C., W. D. Pa.) 168 Fed. 73; Schmertz Wire-Glass Co. v. Highland Glass Co. (C. C., W. D. Pa.) 178 Fed. 945; Highland Glass Co. v. Schmertz Wire-Glass Co. (3d Circuit) 178 Fed. 949, 102 C. C. A. 316; and in the opinion of the Circuit Court in the present cases, 178 Fed. 977.
Prior practice was of two kinds — single layer and double layer or “sandwich.” Sandwich was the earlier. The first attempts consisted of putting into a mold a layer of molten glass, then the wire fabric,, then another layer of molten glass, and subjecting the whole to pressure. When the roller process of making sheets of glass came in, the practice followed of rolling a layer of glass, putting upon it the wire fabric, and rolling thereon a top layer of glass. The single layer practice, dating from 1892, consisted in rolling a layer of glass, imbedding a wire mesh therein by means of a corrugated roller, and then pressing a smooth roller over the surface to close the furrows.
In Streator Cathedral Glass Co. v. Wire-Glass Co. (7th Circuit) 97 Fed. 950, 38 C. C. A. 573, wherein the Shuman patents were sustained, the published art relating to single-pour wire-glass is reviewed. As Schmertz’s process and apparatus have to do with two-pour wire-glass, it is manifest that' the single-pour method is neither anticipatory nor limiting.
Prior patents and publications respecting the sandwich method, passing for the moment British patent No. 1,715 of 1874 to Plyatt, are no more illuminative than the above-stated practice.
Before considering Hyatt, it may be well to have in mind the development of wire-glass in the world of industry and commerce. In the ante-Schmertz sandwich method there were three steps, separately taken. The cooling of the first layer before the sandwich could be finished prevented the making of large sheets. What small plates were made were apt to split at the fabric line. At most, the small panes were fit only for skylights and the like. Shuman turned his back on the sandwich method, and by his one-pour process made large *793sheets that were clear and polishable, and therefore usuable in windows, elevator ways, partitions, and the like, where a fireproof, transparent (not merely translucent) wall was desired. This was the first real impress upon industry and commerce. In the Streator Case, supra, Mr. Justice Brown, speaking for the court, said that Shuman’s “was evidently the first practicable method of making wire-glass, and appears to have attracted a good deal of attention in this and other countries, and various medals were awarded to the inventor.” Shuman virtually put on the market a new product, because polished wire-glass of large size was theretofore unknown. Under his process plates aggregating 1,000,000 square feet were made and sold. But Shuman’s glass was liable to have imperfections where the furrows made by the corrugated roller and by the wire me&h were smoothed over by the third roller. His glass acquired the sobriquet of “caramel.” No wonder that the uniformly consistent Schmertz glass entirely superseded it upon the market. In eight years plates aggregating 31,000,000 square feet of Schmertz glass were put forth, and at the end of that time no Shuman glass was being made anywhere in the United States.
In the provisional specification of the Hyatt British patent appears the following:
“According to another part of my invention for making fireproof glass I make plate or rolled glass with a netting of wire incorporated in the body of tlie plate, one mode of doing this being as follows: T use two drums or rollers, as is done sometimes in making ornamental face glass, one behind the other. The former carries a wrap or web of wire netting, which as it rolls down the ‘metal’ is spread out upon the face of the flattened mass; but this ‘metal’ is only half of what is needed to make the sheet. Another dumping of another mass is made immediately upon the first flattened sheet with its overlaying of wire netting, the second mass failing upon the wire netting, where it is met by the second or following roller and flattened out, thus incorporating the wire sheet between two plates of glass welded together.”
A table and two rollers are suggested, but no time relation is specified. The first roll is to constitute the wire-feed. If more than one turn of wire should be made on the roll, the apparatus would manifestly be inoperative. If one turn only is to be made, no method is shown for holding it in place. No wire-glass could be made of greater length than the circumference of tlie roll. One revolution of the roll would probably occur before the second pour could be made, and in tliat event the second roll would merely spread the top layer upon the completed bottom layer of a sandwich. We perceive in this no clear disclosure of the Schmertz process, wherein the combination of table, rolls, and independent wire-feed is used as a tool to form simultaneously and consistently the two pours and the wire into wire-glass, and wherein the tool is used progressively to complete a plate 10 or 12 feet long and 5 or 6 feet wide. But, at all events, Hyatt abandoned this -proposal when he came to make his final specifications. Therein he took the method of holding the wire at a fixed distance above the face of the table so that one pour of molten glass would go through the mesh and then submerge the wire in the one body of glass. Of such a procedure Jessel, Master of the Rolls, said in Stoner v. Todd, L. R. 4 Ch. Div. 60, 46 L. J. Ch. 33:
*794. “When we find In the final specification that in the description of one of the subordinate matters of the invention one of the details has been abandoned, that is a notification to the public that the inventor could not work it, or thought it useless, and has consequently omitted it altogether.”
Hyatt’s tentative suggestion, still-born and abandoned at birth, unknown, of course, to industry and commerce, lay unnoticed until defenses were sought in the various Schmertz litigations.
5. Schmertz was not a pioneer, as Morse and Howe and Bell were pioneers. Shuman’s success with the one-pour method deprived Schmertz of taking the credit for introducing into commerce large-sized, polished, transparent wire-glass as a new product. Schmertz’s product was -simply better. The practice and publications regarding the three-step sandwich prevented Schmertz from claiming the sandwich method generically. But Schmertz was the first to conceive and devise a combination of a table, two rolls, and a wire-feed which could be used as a single tool to form simultaneously and consistently the two pours and tire wire into wire-glass (particularly the new product, “wire-glass”), and which could be used progressively to complete the large plates that are demanded in modern buildings. With the defense of anticipation out of the way, we credit this achievement with displaying a high order of invention.
6. We have stated what we believe the record shows to have been Schmertz’s real invention. Did he disclose and claim it in the reissued patent in such a way as to cover appellant’s apparatus and method? Appellant manufactures in substantial conformity to the patent to Jungers, No. 867,510, October i, 1907. Claim 1 is a sufficient explanation of the process:
“Tbe process of making glass baving a fire-resisting material incorporated therein, which consists in concurrently forming upon a substantially horizontal support two layers of glass, one upon the other and formed in successive order, and simultaneously paying out under tension and positively and continuously directing into the relatively progressing line of juncture between the finished upper surface of the first layer and the advance meeting portion of the second layer, a fire-resisting reinforcement, said reinforcement being held free from contact with either body of glass until overflowed by the relatively advancing edge of the second layer.”
The apparatus embraces a table, two rolls, and a post-roll chute in connection with which are tension rolls that exert a 12 to 15 pounds resistance to the pull of the glass upon the wire and spreading rolls that spread out the mesh against the elongating pull of the tension rolls.
In the reissued patent the particular mechanism there disclosed only embraced a pre-roll wire-feed. If claim 1 be read only in view of the one sort of wire-feed described in that specification, and if stress be confined to shutting the word “simultaneously” by a comma into a place where it applies only to the joint action of the pre-roll feed and the first roll, the invention we have portrayed.would not be covered. Quite true it is, in the case of the pre-roll feed, that if “simultaneously” be limited to absolute synchronism, to the concurrence of two actions without even an. infinitesimal fraction of time intervening, the pnly synchronism is in the spreading of the first pour and the laying of the wire.' But how did Schmertz word the matter in claims 6 and *7957 of the reissued patent, claims asserted by him in the original patent as well, claims drawn by him, not by the Patent Office ? He said that the process “consists in rolling a sheet of glass of less thickness than the ultimate product required; simultaneously forcing wire upon said sheet and forming a second sheet of glass upon the first sheet.” If regard be given only to the semicolon and the unpunctuated joinder of the laying of the wire with the formation of the second sheet, Schmertz would be made to claim a synchronism that would be absolutely impossible if he were limiting- himself to a pre-roll feed. But when claims 6 and 7 are read in connection with the specification, and the whole viewed in the light of the prior art, we think it clear that Schmertz was claiming the “simultaneous” formation of the two pours and the wire “progressively” into a consistent plate of wire-glass.
It seems equally clear to us that the Patent Office must so have understood Schmertz. These very claims, 6 and 7, were put into interference with Appert’s and his own concurrently pending application. This latter application exhibited a post-roll gravity feed; Appert’s a pre-roll tension feed. Manifestly the common ground was what Appert called “the simultaneous formation of. the two layers with the fabric inclosed between them and the progressive formation of the complete product.” So far as the Patent Office is concerned, we cannot but conclude that the interference issues (claims 1 and 2 of the reissue) were framed to cover this common ground. And the reissue itself gave notice of this position. The specification was amended to show that claims 1 and 2 were inserted to cover broadly the invention common to the three applications that had been in interference. By this reference the public was bound, in our judgment, to ascertain what in the light of the prior art was broadly the invention common to the three as disclosed in the interference proceedings,, just as the public is bound by a reference in a recorded deed to a partition suit for a supplemental description of the land conveyed.
Furthermore, one should expect the apparatus claim to be limited to a pre-roll feed, if the process claims were so limited. But claim 2 purports to cover a post-roll as fully as a pre-roll feed.
Appellant’s apparatus and process we therefore adjudge to be infringements of claims 1, 2, 6, and 7 of the reissued patent.
Appellees’ patent No. 791,217 can be awarded no larger standing than an improvement of the broad invention of the reissue. That, of course, does not preclude others from improving also the primary invention. Each of the claims of patent No. 791,217 is limited to a “by gravity” feed. The patent of Jungers employs a positive feed under both longitudinal and lateral tension. We cannot count this a colorable evasion of the gravity feed, for it does away with the possibility of a waviness in the laying of the wire which sometimes occurs with the gravity feed. And the fact that the last 15 -or 18 inches of. the wire is free from tension should not be held to characterize the process under which sheets ten or more feet long are made. No feeding appliance could well follow the fabric clear inside of the machine.
7. The contention that the process claims are unpatentable subject-matter needs no review, we believe, beyond reference to Expanded *796Metal Co. v. Bradford, 214 U. S. 366, 382-385, 29 Sup. Ct. 652, 53 L. Ed. 1034, and Streator Cathedral Glass Co. v. Wire-Glass Co., 97 Fed. 950, 955, 38 C. C. A. 573.
In cause No. 1,682 the decree is reversed, with the direction to dismiss the bill for want of equity. In cause No. 1,683 the decree is affirmed.