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. 27, 2014
Filed:
Mar. 03, 2010
Applicants:
Kazuaki Ishihara, Nagoya, JP;
Akira Sakakura, Nagoya, JP;
Inventors:
Kazuaki Ishihara, Nagoya, JP;
Akira Sakakura, Nagoya, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F 5/02 (2006.01); C07F 5/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
When phthalic acid is heated in heptane under azeotropic reflux conditions in the presence of a catalytic amount of an arylboronic acid compound (such as 2,6-(diisopropylaminomethyl)phenylboronic acid or 2,6-bis(diisopropylaminomethyl)phenylboronic acid), phthalic anhydride is obtained in high yield.
Ishihara, Kazuaki. (2014). Method for producing carboxylic anhydride and arylboronic acid compound (U.S. Patent No. 8735582). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8735582
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