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:
Oct. 27, 1992
Filed:
Jun. 12, 1989
Eiichi Terada, Ichihara, JP;
Idemitsu Petrochemical Co., Ltd., Tokyo, JP;
Abstract
A styrene-based copolymer comprising 74.3 to 98.7 mol % of the structural unit (I) represented by the general formula: ##STR1## 1.3 to 25.4 mol % of the structural unit (II) represented by the formula: ##STR2## and 10 to 7000 mol ppm of the structural unit (III) represented by the general formula: ##STR3## (wherein R.sup.1 to R.sup.3 are as defined in the appended claims), characterized by having toluene-insoluble content of not more than 0.5% by weight, is disclosed. Efficient processes for producing the above styrene-based copolymer are also disclosed.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile