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. 19, 1999
Filed:
Jun. 05, 1997
Applicant:
Inventor:
David M Mayes, Overland Park, KS (US);
Assignee:
Bayer Corporation, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
558233 ;
Abstract
Disclosed herein is an improved process for preparing methyl dithiocarbazinate by reacting carbon disulfide and hydrazine in an effective ratio to form hydrazinium dithiocarbazinate, followed by methylating the hydrazinium dithiocarbazinate with methyl bromide. The improvement resides in conducting the reaction of the carbon disulfide and hydrazine in the presence of a specified amount of a non-alcoholic solvent to reduce dithiocarbazinate buildup.