US4230776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermosensitive recording paper improved in printing quality
Assignee: Mitsubishi Paper Mills Ltd
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Filing: 1978-12-14
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Granted: 1980-10-28
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Expires: 1998-12-14
Abstract
Abstract The thermosensitive recording paper comprising a support and, supported thereon, a combination of a colorless or slightly colored lactone compound color former and a phenolic compound capable of rendering said lactone compound to develop color, is improved in its printing quality in that said support is an undercoated paper.
Inventors
- 👤 Takao Kosaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:51
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/40; B41M5/41; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S430/00; Y10S430/165; Y10T; Y10T428/00; Y10T428/31
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
65 words
In a thermosensitive recording paper comprising a support and, supported thereon, a combination of a colorless or slightly colored lactone compound color former and phenolic compound capable of rendering said lactone compound to develop color, the improvement whereby the printing quality is improved, which improvement is characterized in that said support is a cast coated paper having a Bekk smoothness of 80 seconds or more.
Claim 2
Dependent Claim
65 words
In a thermosensitive recording paper comprising a support and, supported thereon, a combination of a colorless or slightly colored lactone compound color former and phenolic compound capable of rendering said lactone compound to develop color, the improvement whereby the printing quality is improved, which improvement is characterized in that said support is a cast coated paper having a Bekk smoothness of 80 seconds or more.
Claim 3
Dependent Claim
15 words
The thermosensitive recording paper of claim 1 wherein the cast-coated paper has a specular finish.
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) | 1983-10-28 | 1984-04-28 | 1984-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-28 | 1988-04-28 | 1988-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-28 | 1992-04-28 | 1992-10-28 | $7700.00 | Window Closed / Lapsed |