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. 03, 1990
Filed:
Dec. 16, 1988
Applicant:
Inventors:
Akihiro Ohtsubo, Kawasaki, JP;
Kouhei Morikawa, Kawasaki, JP;
Yohko Kataoka, Yokohama, JP;
Sumio Soya, Yokohama, JP;
Assignee:
Showa Denko K. K., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
548308 ;
Abstract
A hydantoin compound of the formula: ##STR1## (wherein R stands for an alkyl group of 8 to 20 carbon atoms) increases the sensitivity of a color developing reaction of a heat-sensitive recording material and enhances the high-speed recording property of The recordig matvrial Without sacifice of the whiteness thereof. The heat-sensitive recording material containing the hydantoin compound is novel to the art.