The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 09, 1979
Filed:
Oct. 06, 1977
Applicant:
Inventors:
George E Lewis, Arcadia, CA (US);
Charles A Bollfrass, Houston, TX (US);
Assignee:
Hydril Company, Los Angeles, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16L / ;
U.S. Cl.
CPC ...
29458 ; 138 33 ; 166 775 ; 219 1057 ; 219535 ; 285 41 ;
Abstract
Treatment of a steel well pipe connection involves use of an electrical coil and a cylindrical sleeve carrying the coil, and includes the steps: