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. 24, 1989
Filed:
Aug. 31, 1988
Applicant:
Inventors:
Tadashi Okawa, Chiba, JP;
Toshio Suzuki, Chiba, JP;
Assignee:
Toray Silicone Company, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F / ;
U.S. Cl.
CPC ...
556453 ;
Abstract
Polymerizing cyclic trisiloxanes using as the polymerization initiator an alkali metal salt of an organosilane or organopolysiloxane having a terminal alkenyl group, followed by termination of the reaction, produces an organopolysiloxane having an alkenyl group on one end. These organopolysiloxanes are useful for making copolymers and as additives to siloxane elastomers.