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. 07, 1991
Filed:
Sep. 19, 1989
Applicant:
Inventors:
Masahide Ogawa, Shibata, JP;
Teiji Sato, Shibata, JP;
Kiyoshi Abe, Shibata, JP;
Hisashi Tsuchida, Nakajo, JP;
Hiroo Inoue, Shiunji, JP;
Mitsuo Saito, Nakajo, JP;
Assignee:
Mizusawa Industrial Chemicals, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B41M / ; B41M / ;
U.S. Cl.
CPC ...
503225 ; 106 21 ; 427150 ; 428342 ; 502 81 ; 503219 ;
Abstract
Disclosed is a color developer for a pressure-sensitive recording paper, which comprises an acid-treated smectite clay mineral having a specific chemical composition, an X-ray diffraction pattern peculiar to dioctahedral smectite, a specific solid NMR spectrum and a specific cation exchange capacity. This color developer shows a high whiteness, a high initial color density, excellent light resistance and weatherability, and a low viscosity.