Patent US4751213A successfully refreshed from Google Patents.
US4751213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recording material
Assignee: Fujifilm Holdings Corp
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Filing: 1986-06-10
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Granted: 1988-06-14
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Expires: 2006-06-10
Abstract
Abstract A recording material comprising a support having thereon a layer comprising a polymer of an electron-donating color former and an electron-accepting compound which is capable of forming color upon contact with said electron-donating color former. The recording material is useful in duplication by pressure-sensitive or heat-sensitive recording.
Inventors
- 👤 Masato Satomura
- 👤 Akira Igarashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:22
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/132; B41M5/136; B41M5/26; B41M5/30; B41M5/323
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A recording material comprising a support having thereon a layer comprising a polymer of an electron-donating color former prepared by reacting a color former having at least one ##STR5## with a compound having a vinyl group and an active group, and an electron-accepting compound which is capable of forming color upon contact with said electron-donating color former.
Claim 2
Dependent Claim
57 words
A recording material comprising a support having thereon a layer comprising a polymer of an electron-donating color former prepared by reacting a color former having at least one ##STR5## with a compound having a vinyl group and an active group, and an electron-accepting compound which is capable of forming color upon contact with said electron-donating color former.
References Cited (Backward Citations)
US4632899A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-06-14 | 1991-12-14 | 1992-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-14 | 1995-12-14 | 1996-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-14 | 1999-12-14 | 2000-06-14 | $7700.00 | Window Closed / Lapsed |