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:
Aug. 02, 1977
Filed:
Feb. 02, 1976
Applicant:
Inventors:
Ronald K Churchman, Plano, TX (US);
John H Yonker, Dallas, TX (US);
Assignee:
Otis Engineering Corporation, Dallas, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166153 ; 166241 ; 277149 ;
Abstract
Disclosed is a pumpdown tool for a well, the tool including a housing having a circumferentially extending seal on its outer surface and having a circumferential centralizer to protect the seal while the tool is being run in the well tubing.
Churchman, Ronald. (1977). Circumferential centralizer (U.S. Patent No. 4039027). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4039027
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile