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. 06, 1990
Filed:
Nov. 30, 1988
Applicant:
Inventors:
Takao Aoyagi, Sagamihara, JP;
Shuji Sato, Yachiyo, JP;
Minako Yasu, Tokyo, JP;
Iwao Nozawa, Funabashi, JP;
Yousuke Suzuki, Kawasaki, JP;
Assignee:
Lion Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K / ;
U.S. Cl.
CPC ...
428-1 ; 428913 ;
Abstract
A polymer membrane for delivering a drug is provided. The membrane is capable of regulating the delivery of the drug and comprises (A) a porous hydrophobic polymer membrane having a pore diameter of not larger than 3 .mu.m and a porosity of 10 to 90% which is immobilized with (B) a specific liquid crystal-forming compound having a gel/liquid crystal transition temperature in the range of 25.degree. to 45.degree. C.