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:
Jul. 24, 1984
Filed:
Jul. 08, 1982
Applicant:
Inventors:
Yukiya Nakasato, Matsudo, JP;
Atsuo Kuramoto, Tokyo, JP;
Sadao Morishita, Ibaraki, JP;
Shigetoshi Hiraishi, Tokyo, JP;
Assignees:
Mitsubishi Paper Mills, Ltd., Tokyo, JP;
Mitsubishi Gas Chemcail, Co., Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B41M / ;
U.S. Cl.
CPC ...
346211 ; 346212 ; 346216 ; 346225 ;
Abstract
A condensate free from stickiness and exhibiting an excellent initial color-formability when used as color developer of pressure sensitive copying paper can be obtained by reacting p-hydroxybenzoic acid and one p-alkyl-substituted phenol or a mixture of two or more p-alkyl-substituted phenols with formaldehyde in the presence of an acid catalyst and then directly taking out the condensate into cold water without any procedure such as dehydration, concentration, etc.