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:
Mar. 15, 1977
Filed:
Jan. 19, 1976
Applicant:
Inventors:
Kichiji Enoki, Takaoka, JA;
Takeo Fukui, Takaoka, JA;
Takeo Yamamoto, Takaoka, JA;
Toshirou Okada, Takaoka, JA;
Yoshiaki Miyazaki, Takaoka, JA;
Assignee:
Nippon Soda Company Limited, Tokyo, JA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
2606 / ; 2604 / ;
Abstract
Pure 4,4'-dichlorodiphenylsulfone is separated from the reaction mixture containing 4,4'-dichlorodiphenylsulfone and the isomers thereof by adding the reaction mixture to the mixture of trichloroethylene or tetrachloroethylene, and water to extract 4,4'-dichlorodiphenylsulfone with said organic solvent and cooling the organic solution separated from the water layer to precipitate pure 4,4'-dichlorodiphenylsulfone.
Quick Actions:
Enoki, Kichiji. (1977). Process for the separation of 4,4'-dichlorodiphenylsulfone (U.S. Patent No. 4012451). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4012451
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile