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:
Jan. 01, 1991
Filed:
Nov. 03, 1989
Naoto Yanagihara, Shizuoka, JP;
Ken Iwakura, Shizuoka, JP;
Hiroo Fukunaga, Shizuoka, JP;
Akira Igarashi, Shizuoka, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
A recording material is disclosed, which comprises a support having thereon a recording layer comprising at least one electron-donating colorless dye and at least one electron-accepting compound, wherein said electron-donating colorless dye is a fluorene derivative having a substituted amino group at the 3-position and the 5-position or a substituted amino group at the 2-position and the 6-position. The recording material gives colored portions having light absorption at near infrared region, has improved coloring property and shelf life, and gives colored images having improved stability.