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. 23, 1979
Filed:
May. 08, 1978
Applicant:
Inventors:
Klaus Hestermann, Erftstadt Bliesheim, DE;
Gero Heymer, Erftstadt, DE;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
423299 ;
Abstract
Phosphine (hydrogen phosphide) is made by reacting gaseous yellow phosphorus with steam at temperatures of 280 to 400.degree. C in the presence of ammonia in contact with a carbon catalyst.