Patent US4286017A successfully refreshed from Google Patents.
US4286017A
Expired / Lapsed
US
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Heat-sensitive recording paper
Assignee: Honshu Seishi KK
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Filing: 1979-09-10
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Granted: 1981-08-25
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Expires: 1999-09-10
Abstract
Abstract Disclosed is a heat-sensitive recording paper comprising a colorless or pale-colored chromogenic substance and a phenolic substance for coloring the chromogenic substance by heating, in which amorphous synthetic aluminum silicate and/or amorphous synthetic magnesium silicate is incorporated in a recording layer.
Inventors
- 👤 Masato Nakamura
- 👤 Saburo Nishimatsu
- 👤 Toshitake Itoh
- 👤 Katsumi Moronuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:39
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; B41M5/337; B41M5/3377; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/25; Y10T428/251; Y10T428/254; Y10T428/258; Y10T428/259; Y10T428/26; Y10T428/268; Y10T428/269
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
61 words
In a heat-sensitive recording paper having a heat-sensitive recording layer comprising a colorless or pale-colored chromogenic substance and a phenolic compound, the improvement characterized in that from 10 to 70% by weight of at least one amorphous synthetic compound selected from the group consisting of amorphous synthetic aluminum silicate and amorphous synthetic magnesium silicate is incorporated into said heat-sensitive recording layer.
Claim 2
Dependent Claim
61 words
In a heat-sensitive recording paper having a heat-sensitive recording layer comprising a colorless or pale-colored chromogenic substance and a phenolic compound, the improvement characterized in that from 10 to 70% by weight of at least one amorphous synthetic compound selected from the group consisting of amorphous synthetic aluminum silicate and amorphous synthetic magnesium silicate is incorporated into said heat-sensitive recording layer.
Claim 3
Dependent Claim
23 words
A heat-sensitive recording paper as set forth in claim 1 wherein the amorphous synthetic compound has a particle size smaller than 6 μm.
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) | 1984-08-24 | 1985-02-23 | 1985-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-24 | 1989-02-23 | 1989-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-24 | 1993-02-23 | 1993-08-25 | $7700.00 | Window Closed / Lapsed |