EP0238709B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Heat-sensitive recording materials
Assignee: Nippon Paper Industries Co Ltd
•
Filing: 1986-09-10
•
Granted: 1991-07-17
•
Expires: 2006-09-10
Abstract
No abstract record available.
Inventors
- 👤 Norikazu Kasamatsu
- 👤 Masao Matsukawa
- 👤 Hirokazu Hirata
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 14:53
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; B41M5/337; B41M5/3372
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
92 words
A heat-sensitive recording material comprising a sheet substrate having applied thereto a heat-sensitive, color-developing layer containing as the main components a colorless or light-colored leuco dye, a developer for permitting said dye to develop a color by heating and a binder, in which the binder used is an ammonium salt of a diisobutylene/maleic anhydride copolymer expressed in terms of the following general formula: wherein R stands for a diisobutylene group, said ammonium salt being modified by substituting part of it by an ammonium salt comprising a primary, secondary or tertiary ethanol amine.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.