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. 16, 1980
Filed:
May. 04, 1978
Applicant:
Inventors:
Alice U Hahn, Orinda, CA (US);
Richard H Rider, El Cerrito, CA (US);
Herbert B Scher, Moraga, CA (US);
Garrard L Hargrove, Vacaville, CA (US);
Assignee:
Stauffer Chemical Company, Westport, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ; C08J / ; C08J / ; C08K / ;
U.S. Cl.
CPC ...
428407 ; 427215 ; 427220 ; 428905 ; 428907 ; 427221 ;
Abstract
Open-ended pores of a porous granule are filled with a liquid material which is at least partially immiscible with water, and sealed with a porous polyurea membrane which limits the release rate of the material into the surrounding medium. The membrane is formed by