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:
Jul. 20, 1993
Filed:
Sep. 28, 1990
Applicant:
Inventors:
Ronald A Greinke, Medina, OH (US);
Ronald A Howard, Brook Park, OH (US);
Assignee:
UCAR Carbon Technology Corporation, Danbury, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16J / ;
U.S. Cl.
CPC ...
277102 ; 277112 ; 277123 ; 277125 ; 277227 ; 2772 / ; 277D / ; 264291 ; 264335 ; 427227 ; 427228 ; 428244 ; 428408 ;
Abstract
An article, such as a seal ring, suitable for reduction of chatter when used in stuffing boxes with reciprocating stems. The article has an amorphous carbon phase at the surface of the article with the amorphous carbon phase extending into the article from the surface.