Patent No. 1,595,426, for a refrigerating transportation
package, consisting of an outer, insulating container, with the
food substance to be refrigerated (
e.g., ice cream) so
packed therein as to surround a quantity of solid carbon dioxide in
its separate insulating container, and thus to act, with the
evolved gaseous dioxide, as a protection for the solid dioxide
against exterior heat, the gas also serving to displace air from
the food and refrigerate it,
held void for want of novelty
and invention.
Rehearing of the cause reported
ante, p.
283 U. S. 27,
limited to the validity of the patent.
MR. JUSTICE BRANDEIS delivered the opinion of the Court.
The circuit court of appeals held the patent valid and
infringed. 38 F.2d 62. In our opinion delivered
Page 283 U. S. 421
March 9, 1931, we found it unnecessary to determine the validity
of the patent because we held that the bill should be dismissed on
the ground that the owner of a patent may not limit its use so as
to require that unpatented materials employed in practicing the
invention shall be purchased only from the licensor,
ante,
p.
283 U. S. 27. On
March 16, 1931, the Carbice Corporation petitioned that the Court
rule also on the validity of the patent. The reason assigned was
the inauguration by the Dry Ice Corporation of a campaign of
intimidation against customers of the Carbice Corporation by
releasing to the public press a statement that the validity of the
patent as sustained by the court of appeals had not been disturbed;
that the true patent monopoly had in no way been limited by this
Court; that we had indicated that the proper way to enforce the
patent monopoly is by directly suing those who use solid carbon
dioxide in the patent combination without a license, and that the
Dry Ice Corporation would immediately bring such a suit. A
reargument, limited to the question of the validity of the patent,
was ordered. The respondents petitioned for a rehearing on the
issue determined in our former opinion. The latter petition was
denied.
The refrigerating transportation package which is specified and
claimed in the patent in suit is described in the earlier opinion,
ante, p.
283 U. S. 27. The
alleged invention is for the locational arrangement of materials
within a container. Whether a locational arrangement within a
structure can ever be patented as a manufacture need not be
determined. Nor need we consider whether the patent, as issued,
contained a sufficient disclosure of the alleged invention. For the
combination in suit lacks patentable invention and novelty. Each of
the elements -- refrigerant, material to be refrigerated, and
container -- performs its function in a known way. Long prior to
the date of the claimed invention, it was known that solid carbon
dioxide, which has a temperature of 110
Page 283 U. S. 422
degrees below zero, is a refrigerant; that, when it "melts," it
passes directly into a dry gas heavier than air, of like low
temperature, which may serve as a refrigerant until its temperature
rises to that of the outside air. It was known also that a frozen
article -- be it ice cream or solid carbon dioxide -- will remain
frozen longer if insulated, and that paper is an insulator. It was
not invention to conclude that a cake of the solid dioxide wrapped
in paper would remain solid longer if also surrounded by ice cream
than if placed in more immediate proximity to the walls of the
container, and thus to the outer air, or to conclude that the gas,
being heavier than air, would, as generated, drive the air out of
the container, and thus serve as an additional insulator.
Compare Hollister v. Benedict & Burnham Mfg. Co.,
113 U. S. 59,
113 U. S. 72-73;
Dreyfus v. Searle, 124 U. S. 60,
124 U. S. 63;
Wilson v. Janes, 3 Blatchf. 227.
Moreover, the structural device of surrounding the refrigerant
by the article to be refrigerated had been shown in the Mosler and
Ladewig refrigerating butter-box, United States patent No. 236,906,
issued January 25, 1881, and in Rumpel's portable lunch box. United
States patent No. 1, 130,932, issued March 9, 1915. It is true
that, in these prior art structures, the refrigerant employed was
not completely surrounded by the refrigerated materials, as the top
or bottom of the ice container was usually left exposed. This was
done to permit access to the ice chamber for the purpose of
removing water. Since carbon dioxide sublimes directly into a dry
gas, such access obviously need not be provided, and the
refrigerant may be surrounded on all four sides. This difference is
unimportant. These references suffice to render the patent invalid
also because of anticipation without considering the additional
defense of prior use.