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:
May. 08, 1984
Filed:
Sep. 22, 1981
Applicant:
Inventors:
Mohammad Salman, Lucknow, IN;
Suprabhat Ray, Lucknow, IN;
Ved P Kamboj, Lucknow, IN;
Nitya Anand, Lucknow, IN;
Assignee:
Council of Scientific and Industrial Research Rafi Marg, New Delhi, IN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ;
U.S. Cl.
CPC ...
548525 ; 544151 ; 544376 ; 546196 ; 549406 ;
Abstract
The laevo and dextro forms of dl-3,4-trans-2,2-disubstituted-3,4-diarylchromans and similar derivatives thereof have substantially double the post-coital anti-fertility activity of the known racemic compound. The resolution of such known compound into the l- and d-isomeric forms may be carried out using di-p-toluoyl-l-tartaric acid monohydrate or di-p-toluoyl-d-tartaric acid.