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. 24, 2006
Filed:
Mar. 07, 2003
Arun Kumar Sinha, Himachal Pradesh, IN;
Bhupendra Prasad Joshi, Himachal Pradesh, IN;
Anuj Sharma, Himachal Pradesh, IN;
Arun Kumar Sinha, Himachal Pradesh, IN;
Bhupendra Prasad Joshi, Himachal Pradesh, IN;
Anuj Sharma, Himachal Pradesh, IN;
Council of Scientific and Industrial Research, New Delhi, IN;
Abstract
The present invention relates to 'a microwave induced process for the preparation of 4-vinylphenols or its derivatives' in which commercially important FEMA GRAS approved perfumery and flavouring vinylphenols (i.e. hydroxystyrenes) namely 4-vinylguaiacol (FEMA GRAS No. 2675) and 4-vinylphenol (FEMA GRAS No. 3739) as well as other useful vinylphenols such as 2,6-dimethoxy-4-vinylphenol, 2-hydroxy-4-vinylphenol, 3-hydroxy-4-vinylphenol etc. by condensation of malonic acid and 4-hydroxyphenylaldehydes or its derivatives.