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. 11, 2021
Filed:
Jul. 16, 2018
Applicant:
Lonza Ltd, Visp, CH;
Inventors:
Michael Bersier, Ausserberg, CH;
Anna Kulesza, Ausserberg, CH;
Paul Hanselmann, Brig-Glis, CH;
Christof Aellig, Spiez, CH;
Sarah Filliger, Naters, CH;
Assignee:
LONZA LTD, Visp, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 201/08 (2006.01); C07C 205/58 (2006.01);
U.S. Cl.
CPC ...
C07C 201/08 (2013.01); C07C 205/58 (2013.01);
Abstract
The invention discloses a method for preparation of 5-fluoro-2-methyl-3-nitrobenzoic acid and its methyl ester by conversion of 5-fluoro-2-methylbenzoic acid with fuming nitric acid and oleum and subsequent conversion with methanol.