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:
Aug. 07, 1979
Filed:
Mar. 08, 1978
Applicant:
Inventors:
Clifford S Labaw, Philadelphia, PA (US);
Robert L Webb, West Chester, PA (US);
George R Wellman, Warminster, PA (US);
Assignee:
SK&F Lab Co., Carolina, PR (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
548342 ;
Abstract
New imidazolemethylphosphonium salts having a degradable group at the 2-position which are useful intermediates for preparing histamine H.sub.2 antagonists. This invention concerns the preparation of imidazolemethylphosphonium salts having no substituent at the 2-position by heating the compounds referred to above.