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:
Mar. 28, 2000
Filed:
Jun. 12, 1997
Applicant:
Inventors:
Ashoke Kumar, Mandideep, IN;
Dharmendra Singh, Mandideep, IN;
Mukesh Jagannath Wani, Mandideep, IN;
Narendra Sriram Joshi, Mandideep, IN;
Pravin Sahadev Thombre, Mandideep, IN;
Ajay Singh Rawat, Mandideep, IN;
Assignee:
Lupin Laboratories Limited, Bombay, IN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
544276 ;
Abstract
N-7 isomer of the formula ##STR1## is converted into a N-9 isomer of the formula ##STR2## by heating a suspension of the N-7 isomer in an alkylating agent of the formula ##STR3##