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:
Jun. 27, 2000
Filed:
Sep. 29, 1997
Applicant:
Inventors:
Assignee:
Brantford Chemicalss Inc., Brantford, CA;
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07D / ; C07D / ;
U.S. Cl.
CPC ...
544291 ; 540575 ; 544284 ; 544367 ; 544374 ; 544377 ; 544379 ; 544388 ; 544390 ; 558385 ; 558386 ; 558413 ; 558417 ;
Abstract
Novel methods for the synthesis of substituted ureas and guanidines including Terazosin, Prazosin, Doxazosin, Tiodazosin, Trimazosin, Quinasin and Bunazosin (exemplary of 2-amino substituted Quinazolines), Meobentine and Bethanidine and novel intermediates suitable for use in such methods of synthesis are taught.