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. 05, 1999
Filed:
Jun. 12, 1997
Applicant:
Inventors:
Yumiki Noda, Ichihara, JP;
Takashi Honma, Ube, JP;
Assignee:
Ube Industries, Ltd., Ube, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
558360 ; 560 83 ; 560102 ; 558378 ; 558425 ;
Abstract
A 2,2',5,5',6,6'-hexafluorobiphenyl-3,3',4,4'-tetracarboxylic acid precursor as an intermediate material for a highly functional fluororesin may be produced at a high yield by reacting tetrafluorophthalonitrile with an alkali metal iodide.