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. 13, 1993
Filed:
Jan. 14, 1992
Applicant:
Inventors:
Robert H Hofeldt, Littleton, MA (US);
Steven A White, Buzzard, GB;
Assignee:
W. R. Grace & Co.-Conn., New York, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C08K / ; C08K / ; B32B / ;
U.S. Cl.
CPC ...
523100 ; 524 72 ; 524 76 ; 524111 ; 524112 ; 428159 ;
Abstract
A sealing composition for a container closure comprising a polymeric matrix material and is modified by the inclusion therein of an oxygen scavenger. The composition can be in fluid or meltable form ready for application to a closure or it can be present as a deposit on the closure, for instance a gasket around the closure. Preferably the scavenging properties of the deposit are activated by pasteurizing or sterilizing the deposit when sealing a container with the closure. The invention is of particular value when the closure is a metal cap for a beer bottle.