Legal Opinion
American Lecithin Co. v. Warfield Co.
Court of Appeals for the Seventh Circuit
Decided June 4, 1942No. 7923PublishedCited by 11 opinions
1Opinion of the Court
KERNER, Circuit Judge.
Plaintiff charged defendant with infringement of Patent No. 1,781,672, issued November 11, 1930, to Working. The defenses were invalidity, noninfringement, and misuse of the patent in such a way as to create a monopoly in an unpatent-ed commodity sold by plaintiff. The District Court found that plaintiff was using the patent to create a monopoly in lecithin, an unpatented commodity; that all the claims were invalid; that the defendant did not infringe claims 4, 9, 10, 11 or 13, but did infringe claims 6 and 12 if they were valid; and dismissed the complaint. From that…
2Cases cited6 opinions
- American Lecithin Co. v. Warfield Co.Court of Appeals for the Seventh Circuit · 1939
- Hamilton Laboratories, Inc. v. MassengillCourt of Appeals for the Sixth Circuit · 1940
- Moline Plow Co. v. Rock Island Plow Co.Court of Appeals for the Seventh Circuit · 1914
- American Lecithin Co. v. Warfield Co.District Court, N.D. Illinois · 1941
- American Lecithin Co. v. Warfield Co.District Court, N.D. Illinois · 1938
1 more not listed; retrieve them via the Exa API.
3Cited by11 opinions
- Davison Chemical Corp. v. Joliet Chemicals, Inc.Court of Appeals for the Seventh Circuit · 1950
- National Lead Company v. Western Lead Products CompanyCourt of Appeals for the Ninth Circuit · 1963
- Thompson v. American Tobacco Co.Court of Appeals for the Fourth Circuit · 1949
- General Steel Products Company v. LorenzDistrict Court, S.D. Florida · 1962
- Cleeton v. Hewlett-Packard CompanyDistrict Court, D. Maryland · 1972
6 more not listed; retrieve them via the Exa API.