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. 29, 2007
Filed:
Jul. 25, 2006
Applicants:
Pandurang Balwant Deshpande, Vadodara, IN;
Bharat Becharbhai Boda, Vadodara, IN;
Sachin Surendra Surti, Vadodara, IN;
Pranay Pravinchandra Shah, Vadodara, IN;
Inventors:
Pandurang Balwant Deshpande, Vadodara, IN;
Bharat Becharbhai Boda, Vadodara, IN;
Sachin Surendra Surti, Vadodara, IN;
Pranay Pravinchandra Shah, Vadodara, IN;
Assignee:
Alembic Limited, Gujarat, IN;
Primary Examiner:
Int. Cl.
CPC ...
C07D 405/14 (2006.01); C07D 405/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention relates an improved process for the preparation of tetrahydro-β-carboline derivative of formula (V) which is useful as an intermediate for the preparation of Tadalafil of formula (I). Moreover, the present invention relates to the process for the preparation of Tadalafil of formula (I)