Legal Opinion
Tschappat v. Hinderliter Tool Co.
Court of Appeals for the Tenth Circuit
Decided September 8, 1938No. 1668PublishedCited by 8 opinions
1Opinion of the Court
PHILLIPS, Circuit Judge.
Tschappat and Callahan brought this suit against the Hinderliter Tool Company for alleged infringement of claims 1, 4 and 5, and 2, 6 and 7 of patent number 1,830,-893. The application was filed June 18, 1928, as a continuation of application serial number 88,272 filed February 15, 1926.
The patent covers a tubing hanger used in connection with oil wells and includes means for sealing the opening between the tubing and the casing.
In oil wells a casing is set in the hole and topped with a casing head near the ground level. When the well is to be pumped, a tubing, through…
2Cases cited5 opinions
- I. T. S. Rubber Co. v. Essex Rubber Co.Supreme Court of the United States · 1926
- Jensen-Salsbery Laboratories, Inc. v. O. M. Franklin Blackleg Serum Co.Court of Appeals for the Tenth Circuit · 1934
- Ruth v. Climax Molybdenum Co.Court of Appeals for the Tenth Circuit · 1937
- Callison v. PickensCourt of Appeals for the Tenth Circuit · 1935
- Gasoline Products Co. v. Champlin Refining Co.Court of Appeals for the Tenth Circuit · 1936
3Cited by8 opinions
- Strong-Scott Mfg. Co. v. WellerCourt of Appeals for the Eighth Circuit · 1940
- Harris v. National MacHine Works, Inc.Court of Appeals for the Tenth Circuit · 1948
- Texas Co. v. Anderson-Prichard Refining CorporationCourt of Appeals for the Tenth Circuit · 1941
- Zenith Radio Corp. v. LehmanDistrict Court, S.D. New York · 1954
- Allen-Bradley Co. v. Erie Resistor Corp.Court of Appeals for the Third Circuit · 1939
3 more not listed; retrieve them via the Exa API.