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:
Feb. 01, 1983
Filed:
Jul. 11, 1980
Applicant:
Inventors:
Klaus-Dieter Steffen, Hennef, DE;
Manfred Thallmeier, Troisdorf-Eschmar, DE;
Assignee:
Dynamit Nobel AG, Troisdorf, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ;
U.S. Cl.
CPC ...
568 33 ; 568641 ; 568643 ; 252609 ;
Abstract
An improved process for the preparation of oligomeric bromine containing xylylene bisphenol ethers is described wherein xylylene dichlorides and/or dibromides are reacted with bisphenols at 85.degree. to 160.degree. C. in the presence of an alkaline compound or employing the bisphenol in the form of an alkali salt wherein the reaction is conducted employing a ketone as solvent.
Steffen, Klaus-Dieter. (1983). Method of preparing oligomeric brominous xylylene bisphenol ethers (U.S. Patent No. 4371709). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4371709
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile