Ayling v. Hull

The patents of the complainant being introduced in evidence, the prima facie presumption is, that he is the original and first inventor of what is therein described as his invention, and the conduct of the respondent may be regarded as strengthening that presumption rather than as weakening it. The record shows that he applied for patents for the same improvements, and that an interference was declared by the patent office in each case, between his applications and those made by the complainant. The first hearing was before the examiner, and he decided against the respondent. Appeals were taken in due course of business, to the board of appeal and to the commissioner, both being decided in the same way, and he thereupon appealed to the ultimate tribunal, but met with no *273better success. Throughout these controversies, he steadily and constantly maintained the validity of his applications, and still continued to press his claims for patents until the same were granted. The record also shows that having succeeded in obtaining his patents, he brought a suit against the complainant, charging him with infringement of his patents, and claimed that he, the respondent, was the original and first inventor of the improvements therein described and secured. Being unable to show any right to enjoy the property of the invention himself, he now denies the originality of invention either in himself, or the complainant, and seeks to destroy it as a right of property in the complainant. Ungracious, however, as the de-fence is, still, it is a sufficient one if it be proved. But it is not proved, and the pre-tence has no foundation whatever. On the contrary, the testimony introduced by the complainant shows, to the entire satisfaction of the court, that the complainant is, as he alleges himself to be, the original and first inventor of the improvement The pat-entee of the English patent took, as he states in his specification, forty parts of bisulphuret of carbon apd added to it one part of chloride of sulphur prepared as neutral as possible, mixed well the ingredients in a suitable vessel, and immersed caoutchouc in sheets or other forms in the mixture, allowing them to remain therein a longer or shorter time, according to the thickness or substance of the article. The fluid used by the complainant, is the product of the distillation of the natural petroleum or rock oil, and is combined with chloride of sulphur in the proportions before mentioned.

The expert testimony offered by the complainant, shows that coal-tar naphtha has been long known as the light oil produced in the decomposition of coal, when sudden and high heat is applied to it. The statement is that it consists, when highly rectified, in a large part, of a substance called by chemists benzole or benzine, and that it has specific characters, although it is a mixture. The principal expert witness called for complainant states that it has a low boiling point, but congeals wholly or in part at about the temperature of freezing water. It forms compounds of decomposition with nitric-acid, one of which crystallizes and has the composition of compounds in the benzole señes, derived from benzoic acid. One of its peculiar physical characters is, that although very volatile, it does not diffuse in air at forty degrees, and cannot, therefore, be used in the manufacture of air-gas. The witness states that he has been acquainted with the article, under different names, such as coal-tar naphtha, light-spirits naphtha, crude benzole, and rectified naphtha, for more than twenty years. Chemists, he says, have known it more than forty years, under these and other names, and that he has experimented with it at different times within the period since it came to his knowledge. On the other hand, he states that petroleum naphtha or carbon spirits is a fluid distinct from the other hydro-carbons, both in physical and chemical characters, and that it constitute» a new product, which cannot be included in any other known series. He describes'it as a light mobile fluid, obtained in the purification of crude petroleum oil, and by the slow distillation of bituminous coal at the lowest possible heat. His representations are, that it has peculiar physical and chemical characters, as, for example, it has a high boiling point much above that of water, and yet it diffuses in air at a temperature of forty degrees rapidly, and, consequently, becomes an efficient agent in the production of what is termed air-gas. Another characteristic is, that it exhales rapidly and completely at a temperature of sixty degrees without a particle of residuum or without becoming colored, and it may be mixed with other bodies without producing change of color. When exposed to cold, it bears the reduction of fifty degrees below zero without becoming solid, and still remains a mobile fluid, and when mixed with nitric-acid, its chemical property is such that it does not form nitro-benzole by decomposition, nor can the products of the benzoic series be then obtained from it. The conclusion of the witness is, that its elements are differently united from those of coal naphtha, or any of those resulting from the application of a high temperature to coal; and there can be no doubt, in the judgment of the court, that his conclusion is correct. The evidence also shows, that the product obtained by the complainant is new, and that the respondent is plainly in error in the view he puts forth upon that subject. Jurisdiction in suits of this nature is conferred upon the circuit courts by an act of congress, and it is competent for the court to entertain a bill of complaint for an injunction and an account, or for the repeal of an interfering patent for the same invention, at any time after the letters-patent are granted. Undoubtedly the application for injunction is in all cases addressed to the discretion of the court, and it may be that the court, under some circumstances, might order issues to a jury in a suit like the present, for the repeal of an interfering patent. Suffice it to say, however, there are no circumstances in this case which afford any proper ground for the last-named application, and the respondent has no claims for any delay, if the complainant is entitled to a decree.

The theory of fact on which the third de-fence is founded is not correct. The complainant did exercise reasonable diligence in adapting and perfecting his invention, as appears from all the evidence, when properly understood. When he made his invention he intended to apply for a patent, and doubtless would have been so, had he not been misled and been induced to believe that his in*274vention had been anticipated. While laboring under that impression, he decided to keep it a secret and practise it for his own benefit; but the evidence clearly shows that as soon as he was undeceived, and it came to his knowledge that he had not been anticipated, he began his preparations for application for a patent, and obtained it without unnecessary delay. None of the defences set up by the respondent can be sustained, and they are accordingly overruled. The complainant is entitled to a decree as prayed in the bill of complaint,'and for his costs.