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:
Jan. 17, 1978
Filed:
Aug. 29, 1975
Applicant:
Inventors:
Walter Dursch, Schneidhain, Taunus, DT;
Hans-Jerg Kleiner, Kronberg, Taunus, DT;
Horst-Dieter Thamm, Kelkheim, Taunus, DT;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt am Main, DT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F / ; C07F / ; C07C / ;
U.S. Cl.
CPC ...
2605 / ; 2605 / ; 2606 / ;
Abstract
Preparation of phosphonic and/or phosphinic acids by hydrolytic cleavage of phosphonic and/or phosphinic acid alkyl esters in the presence of the phosphonic and/or phosphinic acid by carrying out the hydrolysis at a temperature of from 160.degree. to 250.degree. C with the use of at least a stoichiometric amount of water, and by distilling off the alkanol formed, optionally together with water.
Dursch, Walter. (1978). Preparation of phosphonic and/or phosphinic acids (U.S. Patent No. 4069245). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4069245
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile