It is established beyond question that the trade had no satisfactory paint remover before Ellis' discovery. I do not mean that there had been no others tried, or that they had had no sale whatever; but the overwhelming testimony is that their sales were small, and that they caused much dissatisfaction. The presence of at least 20 per cent, of phenol was alone enough to account for this in the phenol removers, while all concede that the caustic soda solutions were not feasible. Ball’s remover contained no phenol, and relied for its solvent upon benzol; but it had no wax, and the solvent evaporated too quickly to be serviceable. It is true that the defendant sold substantial quantities of Amylene up to 1903, amounting to over 3,000 gallons; but there is real ground to question whether the sales of a large portion of this did not result from the inventor Forrest’s connection with the Long Island Railroad, and from his pecuniary arrangements with the defendant after March 1, 1902; and, diregarding this, the sales were only a minute fraction of what successful removers at once reached upon their appearance. It is therefore quite within moderation to- repeat that no successful paint remover had appeared when Ellis set to work.
Immediately his invention went into great use, and has substantially controlled the field. The business grew enormously, and now
It is said, however, based wholly upon the experiments, that the success was.not made through the patent, but through an evolution from it; that the patent was for a solution of four parts of paraffitie wax, four of Currier’s hard grease, with eight parts of benzol; that this is not a useful solution; and that the commercial form is made of paraffine only. Bacon’s experiments prove, so far as they prove anything, only that the “suitable solution” of the patent was inferior; perhaps, indeed, that it was so inferior as to be altogether invalid as a disclosure. On examination, however, they prove too much, because they include, not only the “suitable solution” of the patent, but a commercial solution going by the name of “Adelite.” -Now, in all cases the “suitable solution” does nearly as well as Adelite, and in one instance more than twice as well. Bacon has proved, therefore, that a' commercial remover is of the same grade as the “suitable solution,” and the commercial remover has the approval of the whole trade. Such is the value of these experiments. Again, Ball’s remover with wax added, and Bennett’s with phenol removed, rank high under Bacon’s experiments, yet each would be covered by the patent.
The defendant’s explanation of this result is not good, which is that amyl alcohol was used, and only about one-eighth of the wax stated in the “suitable’’ example. Amyl alcohol, not fusel oil — which is by no means its- equivalent — was one of the alcohols of the patent, and
However, even if the “suitable solution” had been very inferior, it would have been immaterial, if the patent had shown the road to success, as it certainly did. The commercial composition was clearly disclosed, because the patentee gives a large range of equivalents, both in solvents, waxes, and alcohols. The most that can be urged is that it was necessary to show proportions, and that the trade has used a much thinner mixture. No doubt a patentee must disclose at least one operable form of his invention; he must add to the knowledge of the art enough to make further invention unnecessary, in order to give the full benefit of his discovery; but there is not the slightest reason to doubt that, when he spoke to the art, the art understood him, and knew very well that they might put as much or as little wax into the mixture as served their immediate purpose. Thickeners had been common enough before, and, once the theory of the patent was disclosed, the proportions were not important. At least I may insist upon the defendant’s showing that the disclosure was not clear, and this they have not done, unless by the most ambiguous results of the experiments, which in any case I should not regard.
If, then, it be asked at what point the percentage of phenol avoids infringement, the answer is not hard: Substantially at that point where the prior art supposed it was necessary, as shown by the lowest percentage it had reached. Since Ellis emancipated the art from the necessity, his monopoly should extend to the degree of that emancipation.
Moreover, there is good reason to believe that not all the phenol actually put into the defendant’s Hingerwett and Wonderpaste remains uncombined with the waxes and therefore effective for any purpose. I am impressed with the low percentages which analysis disclosed in some of the defendant’s products actually bought on the market. Whether or not this be true, there is no doubt that the alcohols neutralize the phenol, and make its effect upon the skin and tissues much less serious when used in the small quantities of the present removers. The defendant, whatever the scientific fact, is in no position to dispute that in practice the unneutralized phenol is reduced to much smaller proportions than the actual combination formula, for the record contains declarations from it of the small proportion of phenol which its removers contain. Thus it says, answering an assertion that the removers contained from 10 per cent, to 50 per cent, of phenol:
“The proportion of carbolic acid in the Wilson removers is not much ■greater than in carbolic vaseline”
—a proportion not over 3 per cent. They probably found this necessary because of the complaints and troubles generally arising from the
The usual decree will pass upon claims 6, 7, and 8, with costs.