Legal Opinion
Potash Co. of America v. International Minerals & Chemical Corp.
Court of Appeals for the Tenth Circuit
Decided July 3, 1954No. 4678PublishedCited by 51 opinions
1Opinion of the Court
PICKETT, Circuit Judge.. Potash Company of America 1 was the owner of patents No. 2,046,312 (Anderson Reissue 21,566), Weinig 2,105,294 and Weinig 2,188,932. All three patents relate to various aspects of froth flotation processes for separating sylvite from potash bearing ore known as “sylvinite”. The Anderson reissue patent is wholly devoted to this method, while the Weinig patents combine the process with a heat cycle method. The Anderson patent was issued July 7, 1936, and the Weinig patents, which were improvements on the Anderson patent, were issued a short time thereafter. This action…
2Cases cited42 opinions
- Guaranty Trust Co. v. YorkSupreme Court of the United States · 1945
- Holmberg v. ArmbrechtSupreme Court of the United States · 1946
- Southern Pacific Co. v. BogertSupreme Court of the United States · 1919
- Galliher v. CadwellSupreme Court of the United States · 1892
- Gardner v. Panama RailroadSupreme Court of the United States · 1951
37 more not listed; retrieve them via the Exa API.
3Cited by51 opinions
- Studiengesellschaft Kohle Mbh, as Trustee for the Max-Planck-Institut Fur Kohlenforschung v. Eastman Kodak CompanyCourt of Appeals for the Fifth Circuit · 1980
- Twm Manufacturing Company, Inc., and Turner Quick-Lift Corporation, Plaintiffs v. Dura Corporation and Kidde, Inc.Court of Appeals for the Sixth Circuit · 1984
- Twm Manufacturing Co., Inc. And Turner Quick Lift v. Dura CorporationCourt of Appeals for the Sixth Circuit · 1979
- Cravens L. Wanlass, Energystics, Inc. And Wanlass International, Inc. v. General Electric CompanyCourt of Appeals for the Federal Circuit · 1998
- Baker Manufacturing Company v. Whitewater Manufacturing CompanyCourt of Appeals for the Seventh Circuit · 1970
46 more not listed; retrieve them via the Exa API.