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:
Apr. 08, 2008
Filed:
Mar. 20, 2006
Vummadi Venkat Reddy, Andhra Pradesh, IN;
Boddu Ananda Rao, Andhra Pradesh, IN;
Maruthi Janaki Ram Reddy, Andhra Pradesh, IN;
Chiguru Srinivas, Andhra Pradesh, IN;
Chilukuri Ramesh, Andhra Pradesh, IN;
Vaidya Jayathirtha Rao, Andhra Pradesh, IN;
Vummadi Venkat Reddy, Andhra Pradesh, IN;
Boddu Ananda Rao, Andhra Pradesh, IN;
Maruthi Janaki Ram Reddy, Andhra Pradesh, IN;
Chiguru Srinivas, Andhra Pradesh, IN;
Chilukuri Ramesh, Andhra Pradesh, IN;
Vaidya Jayathirtha Rao, Andhra Pradesh, IN;
Council of Scientific & Industrial Research, New Delhi, IN;
Abstract
The present invention provides a single pot process for the preparation of diazonaphthoquinonesulfonyl ester, a useful organic material for micro electronic and dye industry. This study pertains to the one pot preparation of diazonaphthoquinonesulfonyl esters using the corresponding diazonaphthoquinine sulfonic acid or its sodium salt, diphosgene or triphosgene, variety of hydroxy compounds and tertiary organic base in an organic solvent medium.