Patent US4401721A successfully refreshed from Google Patents.
US4401721A
Expired / Lapsed
US
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Thermosensitive recording materials
Assignee: DAIN NIPPON INSATSU KK
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Filing: 1981-11-19
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Granted: 1983-08-30
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Expires: 2001-11-19
Abstract
Abstract A novel thermosensitive recording material suitable for credit cards, season tickets or passes, and the like to be used for a relatively long period comprises a substrate, a first thermosensitive layer having an acidic developer dispersed in a solid vehicle and laminated on the substrate, and a second thermosensitive layer having a leuco-dye dispersed in a solid vehicle and laminated on the first thermosensitive layer. The recording material can further have a primer layer, an overcoat layer and/or a magnetic recording layer.
Inventors
- 👤 Yoshiaki Hida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:10
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/40; B41M5/42; B41M2205/00; B41M2205/04; B41M2205/38; B41M2205/40; B41M5/30; B41M5/333; B41M5/3333; B41M5/3335; B41M5/423; B41M5/426; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31942; Y10T428/31949; Y10T428/31964; Y10T428/31967
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
62 words
A laminated thermosensitive recording material comprising a substrate, a primer layer adjacent to said substrate comprising a primer resin and an acidic developer, a first thermosensitive layer adjacent to said primer layer comprising a solid vehicle with an acidic developer dispersed therein, and a second thermosensitive layer adjacent to said first thermosensitive layer comprising a solid vehicle with a leuco-dye dispersed therein.
Claim 2
Dependent Claim
62 words
A laminated thermosensitive recording material comprising a substrate, a primer layer adjacent to said substrate comprising a primer resin and an acidic developer, a first thermosensitive layer adjacent to said primer layer comprising a solid vehicle with an acidic developer dispersed therein, and a second thermosensitive layer adjacent to said first thermosensitive layer comprising a solid vehicle with a leuco-dye dispersed therein.
Claim 3
Dependent Claim
17 words
A thermosensitive recording material in accordance with claim 1, wherein said acidic developer is a phenolic compound.
Claim 4
Dependent Claim
26 words
A thermosensitive recording material in accordance with claim 1 or 2, wherein the surface of said substrate which is adjacent to said primer layer is roughened.
Claim 5
Dependent Claim
41 words
A thermosensitive recording material in accordance with claim 3, wherein an overcoat resin layer is applied adjacent to the surface of said second thermosensitive layer which is opposite the surface of said second thermosensitive layer adjacent to said first thermosensitive layer.
Claim 6
Dependent Claim
29 words
A thermosensitive recording material in accordance with claim 4, wherein said overcoat resin layer contains a surface smoothening agent selected from the group consisting of waxes and inorganic fillers.
Claim 7
Dependent Claim
28 words
A thermosensitive layer in accordance with claim 4, wherein said first thermosensitive layer contains a surface smoothening agent selected from the group consisting of waxes and inorganic fillers.
Claim 8
Dependent Claim
28 words
A thermosensitive layer in accordance with claim 3, wherein said first thermosensitive layer contains a surface smoothening agent selected from the group consisting of waxes and inorganic fillers.
Claim 9
Dependent Claim
43 words
A thermosensitive recording material in accordance with claim 1 or 2, wherein an overcoat resin layer is applied adjacent to the surface of said second thermosensitive layer which is opposite the surface of said second thermosensitive layer adjacent to said first thermosensitive layer.
Claim 10
Dependent Claim
29 words
A thermosensitive recording material in accordance with claim 8, wherein said overcoat resin layer contains a surface smoothening agent selected from the group consisting of waxes and inorganic fillers.
Claim 11
Dependent Claim
28 words
A thermosensitive layer in accordance with claim 9, wherein said first thermosensitive layer contains a surface smoothening agent selected from the group consisting of waxes and inorganic fillers.
Claim 12
Dependent Claim
28 words
A thermosensitive layer in accordance with claim 8, wherein said first thermosensitive layer contains a surface smoothening agent selected from the group consisting of waxes and inorganic fillers.
Claim 13
Dependent Claim
30 words
A thermosensitive layer in accordance with claim 1 or 2, wherein said first thermosensitive layer contains a surface smoothening agent selected from the group consisting of waxes and inorganic fillers.
Claim 14
Dependent Claim
32 words
A thermosensitive recording material in accordance with claim 1 or 2, wherein said second thermosensitive layer further contains a surface smoothening agent selected from the group consisting of waxes and inorganic fillers.
Claim 15
Dependent Claim
38 words
A thermosensitive recording material in accordance with claim 1 or 2, wherein a magnetic recording layer is formed on the surface of said substrate opposite to the surface of said substrate which is adjacent to said primer layer.
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) | 1986-08-29 | 1987-02-28 | 1987-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-29 | 1991-02-28 | 1991-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-29 | 1995-02-28 | 1995-08-30 | $7700.00 | Window Closed / Lapsed |