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:
May. 14, 1985
Filed:
Nov. 17, 1982
Applicant:
Inventors:
Cyril F Drake, Harlow, GB;
Ronald Jones, Sawbridgeworth, GB;
Assignee:
ITT Industries, Inc., New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A01N / ; A61K / ; A61K / ; C05B / ;
U.S. Cl.
CPC ...
71 6411 ; 71 65 ; 71 67 ; 71 79 ; 71DI / ; 71904 ; 424 19 ; 424 22 ; 424 23 ; 424 26 ; 424 27 ; 424 28 ; 424 29 ; 424 30 ; 428229 ; 428241 ; 428283 ; 4283055 ; 4283179 ; 428372 ; 428406 ; 428913 ; 501 45 ; 501 47 ; 501 48 ; 523122 ; 523124 ; 601890 ;
Abstract
A composite material for the controlled release of an active substrate comprises a relatively insoluble, e.g. polymeric, matrix (11) in which a soluble particulate material (12) is dispersed. When the composite is placed in an aqueous medium dissolution of the particulate material substantially increases the water permeability of the matrix. This effect may be used to provide for the controlled release of an active material into the aqueous medium.