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. 04, 2000
Filed:
Nov. 26, 1997
Applicant:
Inventors:
Thomas G Archibald, Fair Oaks, CA (US);
James C Barnard, Shingle Springs, CA (US);
Assignee:
Aerojet-General Corporation, Rancho Cordova, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
564 81 ;
Abstract
4-Sulfonamidophenyl hydrazines are prepared by reaction between the hydrazine, optionally substituted, and the corresponding 4-substituted benzenesulfonamides, where the 4-substitution is an appropriate leaving group, in the presence of water and the absence of dimethyl sulfoxide as a solvent. The result is a product of unusually high purity.