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:
Nov. 26, 2002
Filed:
Jan. 05, 2001
Yasuhiro Yoshioka, Minami-ashigara, JP;
Kouta Fukui, Minami-ashigara, JP;
Makoto Suzuki, Minami-ashigara, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
A photothermographic material comprising a defined amount of a compound represented by the following general formula as a reducing agent is disclosed. In the following general formula, R and R each independently represent an alkyl group, at least one of which is a secondary or tertiary alkyl group; R and R each independently represent hydrogen atom or a group that can be a substituent on benzene ring; L represents —S— group or a —CH(R )— group where R represents hydrogen atom or an alkyl group; and X and X′ each independently represent hydrogen atom or a group that can be a substituent on benzene ring. The photothermographic material is characterized by providing sufficient image density by heat development, and showing good silver color tone and little change with time after the development.