US4236732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-sensitive record material
Assignee: New Oji Paper Co Ltd
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Filing: 1977-10-12
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Granted: 1980-12-02
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Expires: 1997-10-12
Abstract
Abstract In a heat-sensitive record material comprising a base sheet having a color developing layer which includes finely divided particles of chromogenic material and finely divided particles of acceptor, a heat fusible material having a relatively low melting point is included in said finely divided particles of chromogenic material and/or said finely divided particles of acceptor.
Inventors
- 👤 Takeshi Murakami
- 👤 Yoshitaka Oeda
- 👤 Hiroo Hayashi
- 👤 Teruo Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:09
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; B41M5/337; B41M5/3375; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24893; Y10T428/24901; Y10T428/25; Y10T428/252
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
111 words
In a heat-sensitive record material comprising a base sheet having a color developing layer which includes finely divided particles comprising colorless chromogenic material and finely divided particles comprising acceptor which is reactive with said colorless chromogenic material to develop a color the improvement in at least one of said two kinds of finely divided particles further including a heat fusible material comelted with said colorless chromogenic material or said acceptor to form a co-melt material, said heat fusible material having a melting point within the range of 60° C. to 200° C. and being capable of dissolving at least one of said colorless chromogenic material and said acceptor therein when melted.
Claim 2
Dependent Claim
111 words
In a heat-sensitive record material comprising a base sheet having a color developing layer which includes finely divided particles comprising colorless chromogenic material and finely divided particles comprising acceptor which is reactive with said colorless chromogenic material to develop a color the improvement in at least one of said two kinds of finely divided particles further including a heat fusible material comelted with said colorless chromogenic material or said acceptor to form a co-melt material, said heat fusible material having a melting point within the range of 60° C. to 200° C. and being capable of dissolving at least one of said colorless chromogenic material and said acceptor therein when melted.
Claim 3
Dependent Claim
28 words
A heat-sensitive record material as defined in claim 1, in which said heat fusible material has a melting point within the range of 65° C. to 120° C.
Claim 4
Dependent Claim
31 words
A heat-sensitive record material as defined in claim 1, in which said heat fusible material is co-melted with said colorless chromogenic material and is substantially non-reactive with said colorless chromogenic material.
Claim 5
Dependent Claim
32 words
A heat-sensitive record material as defined in claim 1, in which said finely divided particles of colorless chromogenic material or acceptor further include at least one inorganic metal compound or inorganic pigment.
Claim 6
Dependent Claim
42 words
A heat-sensitive recording material as defined in claim 1 in which the amount of the said heat fusible material is within the range of 0.2 to 30 parts by weight per one part by weight of said colorless chromogenic material or acceptor.
Claim 7
Dependent Claim
20 words
A heat-sensitive record material as defined in claim 1, in which said heat fusible material is co-melted with said acceptor.
Claim 8
Dependent Claim
17 words
A heat-sensitive record material as defined in claim 6, in which said acceptor is an organic acceptor.
Claim 9
Dependent Claim
24 words
A heat-sensitive record material as defined in claim 6, in which said acceptor comprises a mixture of an organic acceptor with an inorganic acceptor.
Claim 10
Dependent Claim
149 words
In a heat-sensitive record material comprising a base sheet having a color developing layer which includes finely divided particles comprising colorless chromogenic material and finely divided particles comprising acceptor which is reactive with said colorless chromogenic material to develop a color the improvement in at least one of said two kinds of finely divided particles further including a heat fusible material co-melted with said colorless chromogenic material or said acceptor to form a co-melted material, said heat fusible material having a melting point within the range of 60° C. to 200° C. and being substantially non-reactive with said colorless chromogenic material when said co-melted material includes said colorless chromogenic material, said heat fusible material being capable of dissolving at least one of said colorless chromogenic material and said acceptor therein when said co-melted material is melted with said at least one of said colorless chromogenic material and said acceptor.
Claim 11
Dependent Claim
149 words
In a heat-sensitive record material comprising a base sheet having a color developing layer which includes finely divided particles comprising colorless chromogenic material and finely divided particles comprising acceptor which is reactive with said colorless chromogenic material to develop a color the improvement in at least one of said two kinds of finely divided particles further including a heat fusible material co-melted with said colorless chromogenic material or said acceptor to form a co-melted material, said heat fusible material having a melting point within the range of 60° C. to 200° C. and being substantially non-reactive with said colorless chromogenic material when said co-melted material includes said colorless chromogenic material, said heat fusible material being capable of dissolving at least one of said colorless chromogenic material and said acceptor therein when said co-melted material is melted with said at least one of said colorless chromogenic material and said acceptor.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-02 | 1984-06-02 | 1984-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-02 | 1988-06-02 | 1988-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-02 | 1992-06-02 | 1992-12-02 | $7700.00 | Window Closed / Lapsed |