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:
Mar. 20, 1979
Filed:
Sep. 15, 1977
Applicant:
Inventors:
Robert J Weyenberg, Appleton, WI (US);
Don W Seidler, Appleton, WI (US);
Assignee:
American Can Company, Greenwich, CT (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61L / ;
U.S. Cl.
CPC ...
239 56 ; 53478 ; 156289 ; 156290 ; 2064842 ; 428 43 ; 428905 ;
Abstract
A package having plural layers with a quantity of volatile substance such as deodorizer sandwiched between the layers. The outer layers of the laminate are impermeable to the substance and its vapors, and thus prevent escape of the vapors as long as the package is sealed. Upon opening of the package, delamination occurs at the interface between two selected layers such that the volatile substance is covered on one side only by a layer of material which is permeable to the vapors, thereby allowing controlled release of the vapors over a period of time. A process for production of such packages is also disclosed.