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:
Sep. 22, 1992
Filed:
Feb. 11, 1991
Applicant:
Inventors:
Phillip R Beaver, Baton Rouge, LA (US);
Thomas E Henke, Baton Rouge, LA (US);
Charles R Bergen, Baton Rouge, LA (US);
Cecil P Loechelt, II, Baton Rouge, LA (US);
Assignee:
Ethyl Corporation, Richmond, VA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16J / ; G01M / ;
U.S. Cl.
CPC ...
277-1 ; 277-2 ; 73 407 ; 220465 ;
Abstract
This invention relates to a method and an apparatus for sealing a port of a vessel, which apparatus comprises: (a) a seal for forming a gas-tight seal with the port to close off the port, (b) a chamber; and (c) a chamber sweeping gas for sweeping the chamber.