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. 31, 1999
Filed:
Nov. 04, 1997
Applicant:
Inventors:
Hiroshi Kato, Okayama, JP;
Eiichi Torikai, Yao, JP;
Assignee:
Japan Gore-Tex, Inc., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ; B32B / ; B32B / ; B32B / ;
U.S. Cl.
CPC ...
428 77 ; 428 81 ; 428195 ; 428198 ; 428201 ; 4283044 ; 4283055 ; 4283066 ; 4283084 ; 4283105 ; 4283171 ; 4283173 ; 4283184 ; 4283193 ; 428421 ; 428422 ; 204518 ; 204520 ; 204521 ; 204536 ; 204630 ; 204632 ; 204636 ; 277945 ; 277946 ;
Abstract
An assembly consisting of at least one seal layer and a solid polymer ion exchange layer wherein the seal layer covers essentially only the region of the ion exchange layer which is to be sealed. The seal layer is made of porous polytetrafluoroethylene film having one surface coated and partially impregnated with a solid polymer ion exchange material. The seal layer provides support and masking functions for the solid polymer ion exchange layer during intermediate manufacturing steps, and reinforcement and effective sealing when assembled in an electrochemical apparatus.