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:
Mar. 26, 1991
Filed:
Dec. 11, 1989
Applicant:
Inventors:
Othmar Stelzer, Wuppertal, DE;
Klaus-Peter Langhans, Wuppertal, DE;
Jurgen Svara, Koln, DE;
Norbert Weferling, Hurth, DE;
Assignee:
Hoechst Aktiengesellschaft, Werk-Knapsack, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07F / ;
U.S. Cl.
CPC ...
568-8 ;
Abstract
For the preparation of phosphanes, phosphane and alkyl halides are reacted in the presence of alkali metal hydroxide solutions and tetraalkylammonium or tetraalkylphosphonium salts as the catalysts.