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. 27, 1993
Filed:
May. 20, 1992
Applicant:
Inventors:
Assignee:
Wolff Walsrode Aktiengesellschaft, Walsrode, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428213 ; 428 367 ; 428349 ; 428483 ; 428516 ; 428520 ;
Abstract
The invention relates to composite films having a particularly good barrier effect against gases and water vapor without a metal layer, for example of aluminum, having to be present.