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:
Sep. 21, 2004
Filed:
Mar. 20, 2002
Applicant:
Inventors:
Boyapati Manoranjan Choudary, Andhra Pradesh, IN;
Mannepalli Lakshmi Kantam, Andhra Pradesh, IN;
Kompella Vishweshwar Ramprasad, Andhra Pradesh, IN;
Kalluri Venkata Sri Ranganath, Andhra Pradesh, IN;
Assignee:
Council of Scientific and Industrial Research, New Delhi, IN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 3/138 ;
U.S. Cl.
CPC ...
C07D 3/138 ;
Abstract
The present invention provides an ecofriendly process for the preparation 2-nitrothiophenes selectively from thiophene, using metal exchanged clay catalysts and nitric acid, dispensing with the use of acetic anhydride.