Source: http://supreme.nolo.com/us/123/582/case.html
Timestamp: 2019-04-24 03:51:50+00:00

Document:
Under the patent laws, a disclaimer cannot be used to materially alter the character of the patented invention or to effect such a change in it as calls for further description or specification in order to make it intelligible, but its proper office is in the surrender either of a separate claim or of some distinct and separable matter which can be rescinded without mutilating or changing what is left.
The drawings cannot be used on a disclaimer to show that the patent, as changed by the disclaimer, embraces a different invention from that described in the specification.
Sections 4317 and 4322 of the Revised Statutes are parts of one law, having one general purpose, and both relate to the case in which a patentee, through inadvertence, accident, or mistake, and without any fraudulent or deceptive intention, has included in his claims and in his patent inventions to which he is not entitled, and which are clearly distinguishable from those to which he is entitled, the purpose of § 4317 being to authorize him in such case to file a disclaimer of the part to which he is not entitled, and the purpose of § 4322 being to legalize the suits on the patent mentioned in that section, and to the extent to which the patentee can rightfully claim the patented invention.
Bill in equity to restrain alleged infringement of letters patent and for an accounting. The Circuit Court dismissed the bill, from which decree the complainants took this appeal. The case is stated in the opinion of the Court.
This is a suit on a patent in which the court below decided adversely to the complainants. The patent sued on was granted to Lewis Rathbone and William Hailes, November 21, 1865. It was for an alleged improvement in coal stoves of the class known as "cannon" or circular stoves, so called in consequence of their consisting of one cylinder or cannon, without flues or separate fire chambers. The patentees in their specification allege that such stoves have generally been constructed with a contracted outlet, and with provision for admitting air above the fire. This they say they desire to obviate, having found that a much more perfect combustion can be maintained by enlarging the outlet for the smoke and admitting air through the sides of a suspended fire pot at all points, and thus facilitating combustion by supplying oxygen to the burning coals beneath the surface of the fire pot. Another object, they say, is to construct an open circular fire pot, which can be applied to or removed from the stove at pleasure, with a grate in its bottom, said grate being so applied that it can be moved for shaking the ashes from the fire pot when desired.
iron of a flaring form and of such diameter as to leave a free space d all around it, when arranged within the stove. It extends from the enlarged fire chamber C down into the ash chamber B and it is made with vertical openings through its sides for the admission of air into the body of coal within it."
"The bottom of this fire pot is an open grate, G, which may be so applied that it can be moved around a central pin e or turned upon a horizontal bar g, or both of these movements may be provided for. "
"It will then be seen that the fire pot and its grate are united together so that both can be removed from the stove together. By thus connecting the grate and fire pot together and arranging them within the stove so that they are supported or suspended by means above mentioned, they can be removed very readily from the stove when it is necessary to renew them."
"At the junction of the body of the stove with the ash pit section B is a ledge h, extending entirely around the top of said section, as shown in figure 3. This ledge is perforated at regular intervals, and it is covered by means of a marble ring plate i, which is also perforated in a manner corresponding to the perforations through the ledge. This ring plate i being provided with a knob or handle, it constitutes an annular register for regulating the admission of air into the section B of the stove below the point of suspension of the fire pot, as indicated by the arrows in figure 2."
pot must either be admitted through the register J in the feed door, or it must pass through the fire pot. Our object is to maintain such an intense heat -- in the fire pot by the free supply of oxygen to the incandescent coal therein -- all around this pot that there will be little or no smoke formed after the fire is fully started. In this way, we obtain a more perfect combustion and are enabled to burn soft coal and obtain the greatest heating effects therefrom."
"Having thus described our invention, what we claim as new and desire to secure by letters patent is --"
"1st. Arranging a perforated fire pot with a grate bottom within a circular stove, having provision for the admission of air below the point of suspension of said fire pot, substantially as described"
"2d. The combination of an annular horizontal register with a suspended firepot which has perforated sides, substantially as described."
thirds of the way upward towards the top, but the specification speaks generally of vertical openings through the sides for the admission of air into the body of coal, without calling attention to or specifying any limitation to the extent of the openings -- whether all the way or only part of the way up the side of the fire pot, and, as seen, the principal claim is for arranging a perforated fire pot with a grate bottom within a circular stove, having provision for the admission of air below the point of suspension of said fire pot.
"Instead of making the fire dishes to turn on a pivot as previously described, I sometimes hang them by a projection or flange formed upon the upper flange of a fire dish, which flange rests upon a corresponding projection on the inside of the casing."
"The lower ring (f) may be formed in one piece with the bottom of the fire basket, and may be made solid or with apertures. . . . Apertures may be formed in the plate (j) to correspond to similar holes in the bottom of the fire basket, so as to regulate the admission of air to the fuel."
with a grate bottom, suspended by a flange from the body of the stove, projecting into an ash pit or draft chamber, having provision for the admission of air below the point of suspension of the fire pot.
It is true that the device of Russell is not placed in a circular or "cannon" stove, consisting of a single cylinder, as defined in the patent of Rathbone & Hailes; the Russell stove being composed of two cylinders, one of which forms the coal magazine or reservoir. But we fail to see that any inventive power was required to apply the same fire pot to a different kind of circular stove. That no invention was required seems to us too plain for argument. The patent of Zebulon Hunt shows a grated fire pot of flaring form, suspended within the draft chamber of the stove, and provided with a grated bottom, the fire pot suspended in precisely the same manner as in the patent in suit, and the ash pit is provided with means for the admission of air below the point of suspension of the fire pot. Hunt's stove was also a magazine stove. We have no hesitation in holding that the supposed invention of Rathbone & Hailes, as described and claimed in their patent, was anticipated by the prior patents referred to.
entire depth of sides, and limiting such perforations or openings to substantially the lower half of the fire pot, the material or substantial part of the thing patented in and by said claim not hereby disclaimed being as follows:"
" A fire pot suspended from its upper edge with substantially the upper half of its sides made solid, and substantially the lower half of its sides containing perforations or openings."
Viewed as a disclaimer, this instrument naturally excites attention. A disclaimer is usually and properly employed for the surrender of a separate claim in a patent, or some other distinct and separable matter, which can be exscinded without mutilating or changing what is left standing. Perhaps it may be used to limit a claim to a particular class of objects, or even to change the form of a claim which is too broad in its terms; but certainly it cannot be used to change the character of the invention. And if it requires an amended specification or supplemental description to make an altered claim intelligible or relevant, while it may possibly present a case for a surrender and reissue, it is clearly not adapted to a disclaimer. A man cannot, by merely filing a paper drawn up by his solicitor, make to himself a new patent or one for a different invention from that which he has described in his specification. That is what has been attempted in this case. There is no word or hint in the patent that the invention claimed was a fire pot with sides grated only half way, or part of the way, from the bottom towards the top, or that such partially grated sides have any advantage over those grated all the way to the top. The first claim, as modified by the disclaimer, has nothing in the specification to stand upon; nothing to explain it; nothing to furnish a reason for it.
It is contended that the drawings annexed to the patent may be referred to for the purpose of defining the invention and showing what it really was. But the drawings cannot be used, even on an application for a reissue, much less on a disclaimer, to change the patent and make it embrace a different invention from that described in the specification. This is fully and clearly shown in the recent case of Parker & Whipple Co. v. Yale Clock Co., ante, 123 U. S. 87.
"Evidently there are two sections under which a disclaimer can be made in this country: first, under § 4917, where the claim is too broad -- that is to say, in the language of the section, where the patentee 'has claimed more than that of which he was the original and first inventor or discoverer;' second, under § 4922, where a patentee"
"has in his specification claimed to be the original and first inventor or discoverer of any material or substantial part of the thing patented, of which he was not the original and first inventor or discoverer."
"And it goes on to state that he"
"may maintain a suit at law or in equity for the infringement of any part thereof which was bona fide his own if it is a material and substantial part of the thing patented and definitely distinguishable from the parts claimed without right."
We think that counsel is mistaken in supposing that these sections have reference to different sets of circumstances as grounds for a disclaimer. They both relate to the same condition of things in that regard -- namely to the case in which a patentee, through inadvertence, accident, or mistake and without any fraudulent intent, has included and claimed more in his patent than he was entitled to, and where the part which is bona fide his own is clearly distinguishable from the part claimed without right. In every such case, he is authorized by § 4917 to file a disclaimer of the part to which he is not entitled, and that is the only section which gives him this right. The object of the other section (4922) is to legalize and uphold suits brought on such patents as are mentioned in § 4917 to the extent that the patentees are entitled to claim the inventions therein patented, but no costs are allowed to the plaintiffs in such suits unless the proper disclaimer has been entered at the Patent Office before the commencement thereof, and no patentee is entitled to the benefits of this sections if he has unreasonably neglected or delayed to enter a disclaimer.
We do not see how it is possible to misunderstand the two sections when read together, as it is necessary to read them. One section authorizes a disclaimer to be filed in certain cases; the other enables patentees to maintain suits in those cases provided a disclaimer is filed without unreasonable delay. They are parts of one law, having one general purpose, and that purpose is to obviate the inconvenience and hardship of the common law, which made a patent wholly void if any part of the invention was wrongfully claimed by the patentee, and which made such a defect in a patent an effectual bar to a suit brought upon it. There is no such difference in the phraseology of the two sections as to make them apply to different classes of cases. They refer to the same class, and, being read together, throw mutual light on each other, and, viewed in that mutual light, we think it clear that there is no authority for amending a patent by means of a disclaimer in the manner in which the appellants have attempted to amend their patent in the present case.

References: § 4317
 § 4322
 v. 
 § 4917
 § 4922
 § 4917
 § 4917