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:
Feb. 05, 1991
Filed:
Jun. 14, 1985
Applicant:
Inventor:
Granville Hahn, Big Spring, TX (US);
Assignee:
Permian Research Corporation, Big Spring, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C23C / ; B05D / ;
U.S. Cl.
CPC ...
20419231 ; 427 38 ; 427 39 ;
Abstract
A method for retarding non-corrosive mineral build-up and plugging in check valves utilized with downhole reciprocating rod pumps, comprising ion implanting or ion plating the interior facing metal surfaces of the check valve with a nonferrous metal or metal oxide.