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. 04, 1984
Filed:
Dec. 30, 1980
Applicant:
Inventor:
Roland K Belz, Leinfelden-Echterdingen, DE;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A47K / ;
U.S. Cl.
CPC ...
428 36 ; 4242 ; 15624411 ; 15624418 ; 156250 ; 156251 ; 156279 ; 428 65 ; 428 68 ; 428 90 ; 428137 ; 428337 ; 428339 ;
Abstract
A composite foil formed from at least two layers in which at least one normally water-insoluble sealing layer comprises a non-porous layer connected to at least one water soluble layer. The water-insoluble layer is soluble in a non-neutral medium and the water soluble layer is (a) water soluble or (b) water insoluble, but soluble in a non-neutral medium.