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. 15, 2009
Filed:
Dec. 20, 2004
Applicants:
Mato Nagasawa, Shizuoka, JP;
Naoya Atsumi, Shizuoka, JP;
Hirofumi Ichikawa, Osaka, JP;
Inventors:
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K 15/18 (2006.01); C09K 15/32 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for inhibiting the discoloration of methylenebisaniline compounds by adding a phosphine of the formula:(H)—P—(R)(wherein Ris an optionally substituted aryl group or an optionally substituted alkyl group; p is 0, 1 or 2 and q is 1, 2 or 3) to a compound of the formula: (wherein Rand Rare each independently a halogen atom or a C1-C6 alkyl group; a and b are each independently an integer of 0 to 4; m and n are each independently an integer of 1 to 5).
Nagasawa, Mato. (2009). Method for inhibiting the discoloration of methylenebisaniline compounds (U.S. Patent No. 7632424). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7632424
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