1. Certain claims of Wallace and Hand Patent No. 2,236,387, for
an improved cosmetic preparation to retard or inhibit perspiration,
held invalid for want of invention. Pp.
335 U. S.
291-296.
2. Since the use of urea as an anticorrosive agent in other
compounds was already a matter of public knowledge, its use in
antiperspirants to reduce the likelihood of skin irritation or
garment corrosion was merely the application of an old process to a
new use, and was not invention. Pp.
335 U. S.
293-296.
164 F.2d 861 reversed.
In a patent infringement suit, the District Court held the
claims invalid for want of invention and dismissed the complaint.
67 F. Supp. 814. The Court of Appeals reversed. 164 F.2d 861. This
Court granted certiorari. 333 U.S. 853.
Reversed, p.
335 U. S.
296.
MR. JUSTICE BLACK delivered the opinion of the Court.
The respondent, owner of Wallace and Hand patent No. 2,236,387,
filed a complaint against this petitioner for
Page 335 U. S. 292
infringement of claims 1 to 6, 8 to 13, 15 and 16. The District
Court held the claims invalid for want of patentable invention, and
dismissed the complaint. 67 F. Supp. 814. The United States Court
of Appeals for the Seventh Circuit held the claims valid, and
reversed. 164 F.2d 861. The United States Court of Appeals for the
Second Circuit had previously affirmed a district court's
invalidation of the same patent.
Wallace v. F. W. Woolworth
Co., 45 F. Supp. 465; 133 F.2d 763. To resolve the conflict,
we granted certiorari.
The patent is for an "improved" cosmetic preparation to retard
or inhibit perspiration. Prior to application for the patent
(1938), many antiperspirants were on the market containing acid
salts of a metal, usually aluminum chloride or aluminum sulfate.
The acidity produced by these acid-reacting salts is an astringent
which retards perspiration. But, as stated in the patent
specifications, the acid sometimes irritates the skin, and also
rots clothing to which the acid may adhere, particularly when that
clothing is heated by ironing. Thus, in the old antiperspirants,
the astringent qualities of the acid were desirable because
essential to their effectiveness in retarding perspiration; on the
other hand, the skin irritating and cloth corroding qualities of
the acid were obviously undesirable. This was the problem as posed
by the patent application.
The patent specifications asserted and the District Court found
that, though standard alkalies would neutralize, and thus reduce
acidity and consequent skin irritation and cloth corrosion, these
alkalies would, by neutralizing acidity, also reduce the
astringency essential to check perspiration. The claimed discovery
of the patent is in adding to the old acid-salts cosmetics certain
types of the reactive amino chemical group, particularly urea. This
addition, the patentees asserted, results in an improved
Page 335 U. S. 293
compound which checks perspiration but neither irritates the
skin nor corrodes the clothing.
The District Court found that the addition of urea to the older
preparations greatly reduced whatever likelihood there had been
that application of the preparation would irritate skin
* or corrode
garments. It found that the patentees were the first persons to use
urea as a corrosion inhibiting agent in an antiperspirant. But the
District Court also found that, prior to the patentees' alleged
discovery, the use of urea as an anticorrosive agent was already a
matter of public knowledge, and that it had previously been used as
a corrosion inhibitor in compounds other than antiperspirants. As a
consequence of these findings, the District Court held the patent
invalid. The District Court and the United States Court of Appeals,
in the case of
Wallace v. F. W. Woolworth Co., supra, had
held the patent invalid for the same reason.
Long prior to this patent, it was generally recognized in the
chemical field that urea would react with acids, bases, and salts
to produce new substances. Urea had been in general use wherever
these results were desirable for chemical stabilizations. And
respondent concedes that, before application was made for this
patent, it was commonly known, at least by chemists, that urea
would react with acids in a manner which would reduce their
corrosiveness. These facts are made clear by this record, by the
opinions of the four courts that considered
Page 335 U. S. 294
this patent, and by their discussions of the prior patents
relied on by the respondent here.
Prior patents (Schupphaus, No. 514,838, and Koch No. 2,011,292)
had suggested use of urea as a stabilizer against decomposition of
chemical combinations into deleterious acidic substances. It may be
assumed that these patents, standing alone, would not have taught
these patentees to experiment with urea to solve their cosmetic
problem. They do, however, show the state of the prior art, and
point to the possibility of using urea to inhibit unwanted
decomposition of substances containing acid or acid salts. Indeed,
Koch dealt with the addition of urea to aluminum salts. And
Missbach, in No. 2,069,711, proposed to protect clothes from the
deleterious effects of dry cleaning fluids by the use of urea to
prevent injury due to acidic substances brought about by acidic
reactions of carbon tetrachloride. He claimed his invention
provided "an effective corrosion inhibitor."
Shipp patent No. 2, 174,534 pointed out that
"certain uses of sulfuric acids on textiles are so advantageous
that endeavors have been made to so treat textiles with sulfuric
acid as to obtain the desired effects but to avoid the undesirable
effects."
The undersirable result Shipp wanted to eliminate was the
"marked degrading or disintegrating effect on cellulose fibers" of
"strong sulfuric acid." He therefore proposed use of an agent
"capable of inhibiting, or at least greatly retarding, the normal
degrading action of strong sulfuric acid upon cellulose." The
"inhibiting" agent there proposed was urea or other materials such
as "an amide alone or an amide and an amine. . . ." The corrosion
"inhibiting" agents here are amino groups which include urea.
Respondent contends that the Shipp patent is irrelevant. He
urges that the Shipp preparation merely retards corrosion on cloth,
whereas respondent's stops corrosion
Page 335 U. S. 295
completely. He also points out that Shipp dealt with sulfuric
acid, and not an acid salt, as is involved in this patent. He
argues that the teachings of the Shipp and other patents would not
have led a chemist skilled in his art to undertake the experiment
which eventuated in the success of these patentees. He takes this
position because, in the use of alkalies, and even of urea with
plain acids, the acids did not retain their full effectiveness as
antiperspirants. The natural conclusion of a chemist, he argues,
would have been that urea would result in the same failure if
combined with the acid salts involved in his patent. But it did
not. Urea combined with acid salts brought about the desired
result. This result, he therefore contends, was a "paradoxical"
one, unpredictable by a skilled chemist. Consequently, he says, the
discovery rose to the level of patentable invention.
But we think that the state of the prior art was plainly
sufficient to demonstrate to any skilled chemist searching for an
anticorrosive agent that he should make the simple experiment that
was made here. The patentees knew that urea was in general use as a
stabilizing agent with acid and salts. Moreover, the patentees knew
that standard alkalies had been successfully employed in prior
patents for their anticorrosive effect. It is not surprising
therefore that, after experimenting with various standard alkalies
in an effort to find a corrosion inhibitor that would not greatly
reduce acidic astringency, the patentees promptly turned to urea.
Their success was immediate.
As the United States Court of Appeals for the Second Circuit
pointed out when this patent was before it:
". . . skillful experiments in a laboratory, in cases where the
principles of the investigations are well known, and the
achievement of the desired end requires routine work, rather than
imagination, do not involve invention."
These established principles of law would dispose of the
Page 335 U. S. 296
case except for the position taken by the United States Court of
Appeals in this case that the cosmetic problem here was remote and
unrelated to the problems considered in the prior art. For this
reason that court held that patentees in the field of cosmetics
were not bound by prior art knowledge disclosed by the Shipp and
other patents. The court therefore considered this patent almost as
though patentees were writing on a clean sheet. Accordingly, it
held that the use of urea in the cosmetics field with the results
here obtained were patentable invention.
In this, the court was in error. As we have pointed out, the
general store of chemical knowledge in 1938 was such that anyone
working on any problem of acidic corrosion and irritation would
naturally and spontaneously have tried urea. All that these
patentees did was to utilize in a cosmetic preparation publicly
available knowledge that urea would inhibit acidic corrosion. The
step taken by the patentees in advance of past knowledge was too
short to amount to invention. They merely applied an old process of
inhibition to a new cosmetic use. This is not invention.
Dow
Chemical Co. v. Halliburton Oil Well Cementing Co.,
324 U. S. 320,
324 U. S.
327.
Reversed.
MR. JUSTICE DOUGLAS would reverse the judgment on the authority
of
Funk Bros. Seed Co. v. Kalo Inoculant Co., 333 U.
S. 127,
333 U. S. 131,
which was decided after the decision of the Court of Appeals in
this case.
* Petitioner points out that the District Court in the
Woolworth case found the evidence before it inadequate to
show that the old preparations had resulted in substantial skin
irritation, and urges a like inadequacy of evidence here. But the
District Court here found that "the astringent materials may attack
the skin of sensitive individuals," and that "a residue of acid
remained which sometimes irritated the skin."