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:
Oct. 21, 2003
Filed:
Jun. 27, 2002
Applicant:
Inventors:
Chun-Hyuk Lee, Seoul, KR;
Sang-Jin Han, Kyungki-do, KR;
Assignee:
J&J Chemical Co., Ltd., Incheon, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 2/800 ;
U.S. Cl.
CPC ...
C07C 2/800 ;
Abstract
A method for synthesizing hydrazodicarbonamide (HDCA) by a reaction of monohalobiuret metal salt having the formula 1 or 2, which is derived from biuret, and ammonia, wherein M is a metal and X is a halogen. The monohalobiuret metal salt is inexpensive and easy to synthesize and thus a great yield of HDCA can be obtained from the monohalobiuret metal salt at low cost.