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. 27, 1984
Filed:
Feb. 26, 1982
Applicant:
Inventors:
Donald Trimnell, Peoria, IL (US);
Baruch S Shasha, Peoria, IL (US);
Assignee:
Primary Examiner:
Int. Cl.
CPC ...
B01J / ; B32B / ; B32B / ;
U.S. Cl.
CPC ...
42840224 ; 71 6411 ; 71DI / ; 2525 / ; 264-41 ; 264-43 ; 424 22 ; 424 33 ; 424 35 ; 426 96 ; 426103 ; 4272133 ; 42721331 ; 42721336 ; 4284022 ; 42840221 ; 42840222 ;
Abstract
Chemical biological agents to be encapsulated are dissolved or dispersed in an aqueous paste of a gel-forming polyhydroxy polymer. Subsequent addition of boric acid or a boric acid derivative at an alkaline pH converts the paste into a gel, thereby entrapping the agents in a protective matrix. Encapsulation of biologically active compositions provides a shield against hostile environments, improves safety in handling, and slows the release of such compounds to the surrounding medium. Highly volatile liquids are protected against losses by evaporation. Encapsulation also provides protection against decomposition from exposure to ultraviolet light.