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:
Apr. 05, 1988
Filed:
Nov. 13, 1986
Applicant:
Inventor:
Werner Pieper, Kerpen, DE;
Assignee:
Hoechst Aktiengesellschaft, Knapsack, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07F / ;
U.S. Cl.
CPC ...
2605 / ;
Abstract
Phosphonic acid dichlorides of the general formula I ##STR1## are made by reacting thionyl chloride with a phosphonic acid dialkylester of the general formula II ##STR2## and using, as the catalyst, a compound of the general formulae III, IV or V