US4400437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal recording paper
Assignee: Kanzaki Paper Manufacturing Co Ltd
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Filing: 1982-04-14
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Granted: 1983-08-23
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Expires: 2002-04-14
Abstract
Abstract A thermal recording paper having formed on a paper support a color generating layer containing a color former and a color developer that contacts the color former to generate a color, wherein the back side of the paper is treated with an inorganic salt, an anionic high molecular weight electrolyte, an electroconductive metallic compound, alumina sol, or silica sol, and has a surface electrical resistivity of not more than 5x1011 ohms at 25 DEG C. and 40% RH.
Inventors
- 👤 Yoshitaka Oeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:22
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/40; B41M5/42; B41M5/426; B41M5/44; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31703
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A thermal recording paper comprising a color generating layer containing a color former and a color developer that contacts the color former to generate a color formed on a paper support, wherein the back side of the paper is treated with an inorganic salt, an anionic high molecular weight electrolyte, an electroconductive metallic compound, alumina sol, or silica sol, and has a surface electrical resistivity of from 1×10 9 to 1×10 11 ohms at 25° C. and 40% RH.
Claim 2
Dependent Claim
79 words
A thermal recording paper comprising a color generating layer containing a color former and a color developer that contacts the color former to generate a color formed on a paper support, wherein the back side of the paper is treated with an inorganic salt, an anionic high molecular weight electrolyte, an electroconductive metallic compound, alumina sol, or silica sol, and has a surface electrical resistivity of from 1×10 9 to 1×10 11 ohms at 25° C. and 40% RH.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-22 | 1987-02-21 | 1987-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-22 | 1991-02-21 | 1991-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-22 | 1995-02-21 | 1995-08-23 | $7700.00 | Window Closed / Lapsed |