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. 15, 1990
Filed:
Nov. 10, 1988
Applicant:
Inventors:
Shinji Yamada, Osaka, JP;
Yutaka Aoki, Osaka, JP;
Assignee:
Nitto Denko Corporation, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ; B32B / ;
U.S. Cl.
CPC ...
4283055 ; 116200 ; 424-71 ; 4283155 ; 4283159 ; 4283191 ; 4283193 ; 428905 ; 428907 ;
Abstract
A liquid active substance slow releasing device comprising a thermoplastic polyester resin having a glass transition point of from 5.degree. C. to 80.degree. C. and an evaporative liquid active substance having a limited solubility for the aforesaid thermoplastic resin, said device being an opaque resin molding of the thermoplastic resin having dispersed therein the liquid active substance as fine droplets in an amount over the saturation solubility and becoming substantially transparent when the amount of the liquid active substance in the resin molding is reduced.