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. 26, 2004
Filed:
May. 30, 2003
Applicant:
Inventors:
Hiroshi Nakayama, Annaka, JP;
Masao Maruyama, Annaka, JP;
Hiromi Nakabayashi, Annaka, JP;
Susumu Ueno, Takefu, JP;
Assignee:
Shin-Etsu Chemical Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01J 3/868 ; B01J 3/110 ;
U.S. Cl.
CPC ...
B01J 3/868 ; B01J 3/110 ;
Abstract
A sulfonated resin catalyst whose activity has lowered as a result of use in the polymerization of silicone oil is reactivated by washing the catalyst with a low molecular weight siloxane medium, volatilizing off the siloxane medium under atmospheric or reduced pressure, and removing water from the catalyst.