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:
Dec. 02, 2008
Filed:
Jan. 09, 2004
Applicants:
Hiroshi Mikami, Kitakyushu, JP;
Takeshi Sano, Kitakyushu, JP;
Makoto Nitta, Kitakyushu, JP;
Inventors:
Assignee:
Mitsubishi Chemical Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 307/00 (2006.01); C07D 493/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
There is provided biphenyltetracarboxylic dianhydride containing biphenyltetracarboxylic monoanhydride in an amount of not more than 0.4%. By using the biphenyltetracarboxylic dianhydride as a raw material, it is possible to produce polyimide or polyamic acid having an increased molecular weight.
Mikami, Hiroshi. (2008). High-purity biphenyltetracarboxylic dianhydride and process for producing the same (U.S. Patent No. 7459570). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7459570
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile