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:
May. 12, 1981
Filed:
Feb. 27, 1980
Applicant:
Inventors:
Walter Dursch, Konigstein, DE;
Hans-Jerg Kleiner, Kronberg, DE;
Assignee:
Hoechst Aktiengesellschaft, , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F / ;
U.S. Cl.
CPC ...
2605 / ; 260988 ;
Abstract
Process for the manufacture of phosphinic and phosphonic acid anhydrides by reacting phosphinic and phosphonic acid halides with an aliphatic carboxylic acid anhydride and removing the carboxylic acid halide having been formed by distillation.