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:
Nov. 16, 1993
Filed:
Oct. 11, 1991
Applicant:
Inventor:
John H Williford, Atherton, CA (US);
Assignee:
Advanced Polymer Systems, Inc., Redwood City, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A43B / ;
U.S. Cl.
CPC ...
36 43 ; 36 44 ; 36 98 ;
Abstract
An article for the pressure-actuated release of the powder composition comprises a resilient layer having a plurality of discrete reservoirs therein. Each reservoir contains an isolated quantity of an active powder composition, and usually a permeable layer covers an open aperture from the reservoir. As the article is compressed, the powder is forced outward through the permeable layer and into the surrounding environment. In a preferred example, the article is a shoe insole and the active composition is an anti-microbial powder, usually being an anti-microbial agent which is absorbed into porous particles.