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:
Jan. 07, 2003
Filed:
Mar. 13, 2002
Prashant Purushottam Barve, Maharashtra, IN;
Sunil Shankar Joshi, Maharashtra, IN;
Ravindra William Shinde, Maharashtra, IN;
Milind Yashwant Gupte, Maharashtra, IN;
Chandrashekhar Narayan Joshi, Maharashtra, IN;
Shrikant Madhukar Ghike, Maharashtra, IN;
Raghavendra Venkatrao Naik, Maharashtra, IN;
Rajendra Anantrao Kulkarni, Maharashtra, IN;
Aruna Narayan Bote, Maharashtra, IN;
Council of Scientific and Industrial Research, New Delhi, IN;
Abstract
The present invention provides a process for the preparation of highly pure 2-acrylamido-2-methyl-1-propanesulfonic acid in high yield, with improved appearance, by the reaction of acrylonitrile with more than 98% sulfuric acid or oleum and liquefied isobutylene in presence of weak inorganic acids or organic sulfonic acids.