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. 03, 2005
Filed:
Mar. 16, 2001
Raymond Vincent Heavon Jones, Grangemouth, GB;
Alan John Whitton, Grangemouth, GB;
Jennifer Ann White, Grangemouth, GB;
David John Ritchie, Grangemouth, GB;
Robin Fieldhouse, Grangemouth, GB;
Kirstin Maccormick, Grangemouth, GB;
Logan Thomson Nisbet, Grangemouth, GB;
Paul Richard Evans, Grangemouth, GB;
Colin John Bennie, Grangemouth, GB;
Raymond Vincent Heavon Jones, Grangemouth, GB;
Alan John Whitton, Grangemouth, GB;
Jennifer Ann White, Grangemouth, GB;
David John Ritchie, Grangemouth, GB;
Robin Fieldhouse, Grangemouth, GB;
Kirstin Maccormick, Grangemouth, GB;
Logan Thomson Nisbet, Grangemouth, GB;
Paul Richard Evans, Grangemouth, GB;
Colin John Bennie, Grangemouth, GB;
Syngenta Limited, , GB;
Abstract
A process for the preparation of 3-isochromanone which comprises contacting an o-xylene-α,α'-dihalide with carbon monoxide, in the presence of a catalyst and a hindered amine base in a liquid medium comprising water and a tertiary alcohol.