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:
Dec. 10, 1991
Filed:
Feb. 15, 1991
Applicant:
Inventors:
Manfred Abele, Cologne, DE;
Hans-Josef Buysch, Krefeld, DE;
Michael Happ, Dormagen, DE;
Werner Obrecht, Moers, DE;
Heinrich Schrage, Krefeld, DE;
Hugo Vernaleken, Krefeld, DE;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528205 ; 528159 ; 528212 ; 528 86 ;
Abstract
Secondary products formed in the chlorination of butadiene can be reacted with phenols in the absence of iron catalysts to form novolak-like phenolic resins in such a way that the tetrachlorobutane present in the secondary products does not react. It can be distilled off with the excess phenol and isolated in pure form from the distillate obtained.
Abele, Manfred. (1991). Process for the isolation of tetrachlorobutane and for the production of (U.S. Patent No. 5071943). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5071943
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile