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:
Jun. 11, 1996
Filed:
Dec. 13, 1994
Yoshimitsu Tanabe, Kanagawa-ken, JP;
Jotaro Kida, Kanagawa-ken, JP;
Kiyoharu Hasegawa, Kanagawa-ken, JP;
Masakatsu Nakatsuka, Kanagawa-ken, JP;
Masayuki Furuya, Fukuoka-ken, JP;
Takeshi Nishimura, Fukuoka-ken, JP;
Mitsui Toatsu Chemicals, Inc., Tokyo, JP;
Abstract
A process for preparing a polyvalent metal salt of a salicylic acid resin which comprises the steps of reacting salicylic acid or its derivative with styrene or its derivative at a temperature of -20.degree. C. or higher but lower than 40.degree. C. in the presence of sulfuric acid, and then reacting the resulting reaction product with a polyvalent metal compound; an aqueous dispersion in which the polyvalent metal salt of the resin is dispersed in water; and a developing sheet in which the polyvalent metal salt of the salicylic acid resin is used.