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:
Apr. 03, 1979
Filed:
Jul. 25, 1975
Applicant:
Inventors:
John W Bozzelli, Midland, MI (US);
Kent S Dennis, Midland, MI (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ; C08F / ;
U.S. Cl.
CPC ...
526272 ; 260 / ; 260 / ; 526218 ; 526228 ; 526232 ; 526271 ; 528496 ;
Abstract
Relatively large amounts of initiator and short reaction times produce high molecular weight copolymers of phenylmaleic anhydride with a monomer such as styrene whereas normally these conditions would be expected to produce low molecular weight copolymers. Additionally, it was found that the molar ratio of phenylmaleic anhydride and comonomers such as styrene should be controlled to about 1:3 to 1:6 to obtain the high molecular weight desired. Limited use of inert solvents is possible.
Bozzelli, John. (1979). High molecular weight polymers of phenylmaleic anhydride (U.S. Patent No. 4147852). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4147852
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile