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:
Jun. 28, 1977
Filed:
Feb. 25, 1976
Applicant:
Inventor:
William A Dudley, Garland, TX (US);
Assignee:
Teledyne, Inc., Garland, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04F / ; E21B / ;
U.S. Cl.
CPC ...
166317 ; 137 71 ;
Abstract
Disclosed is a circulating valve for use in a well. The circulating valve includes a valve plug initially blocking flow through the valve which moves to a position permitting flow through the valve upon the application of a predetermined pressure differential across the valve plug. This abstract is neither intended to define the scope of the invention, which, of course, is measured by the claims, nor is it intended to be limiting in any way.