US3916068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat sensitive recording material containing decolorizing agent
Assignee: Mitsubishi Paper Mills Ltd
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Filing: 1973-11-06
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Granted: 1975-10-28
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Expires: 1993-11-06
Abstract
Abstract In a heat sensitive recording material comprising a support having a heat sensitive layer or layers thereon which comprise colorless or palely colored chromogenic substance and phenolic substance capable, upon heating, of causing color formation of said chromogenic substance, at least one organic amine derivatives are contained as a decolorizing agent in said heat sensitive layer or another layer adjacent to said heat sensitive layer. Using this recording material, two colors which are clearly distinguishable can be obtained.
Inventors
- 👤 Isao Kohmura
- 👤 Kiyoshi Futaki
- 👤 Kohzo Haino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:24
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; B41M5/305; C; C09; C09D; C09D5/00; C09D5/26
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
79 words
IN A HEAT SENSITIVE RECORDING MATERIAL COMPRISING A SUPPORT HAVING A HEAT SENSITIVE LAYER OR LAYERS THEREON WHICH COMPRISES COLORLESS OR LIGHT COLORED CHROMOGENIC SUBSTANCE AND PHENOLIC SUBSTANCE CAPABLE, UPON HEATING, OF CAUSING COLOR FORMATION OF SAID CHROMOGENIC SUBSTANCE, WHEREIN AT LEAST ONE ORGANI AMINE DERIVATIVE IN THE AMOUNT OF AT LEAST 10% BY WEIGHT OF THE PHENOLIC SUBSTANCE IS CONTAINED AS A DECOLORIZING AGENT IN SAID HEAT SENSITIVE LAYER OR ANOTHER LAYER ADJACENT TO SAID HEAT SENSITIVE LAYER.
Claim 2
Dependent Claim
79 words
IN A HEAT SENSITIVE RECORDING MATERIAL COMPRISING A SUPPORT HAVING A HEAT SENSITIVE LAYER OR LAYERS THEREON WHICH COMPRISES COLORLESS OR LIGHT COLORED CHROMOGENIC SUBSTANCE AND PHENOLIC SUBSTANCE CAPABLE, UPON HEATING, OF CAUSING COLOR FORMATION OF SAID CHROMOGENIC SUBSTANCE, WHEREIN AT LEAST ONE ORGANI AMINE DERIVATIVE IN THE AMOUNT OF AT LEAST 10% BY WEIGHT OF THE PHENOLIC SUBSTANCE IS CONTAINED AS A DECOLORIZING AGENT IN SAID HEAT SENSITIVE LAYER OR ANOTHER LAYER ADJACENT TO SAID HEAT SENSITIVE LAYER.
Claim 3
Dependent Claim
30 words
A heat sensitive recording material according to claim 1, wherein said organic amine derivative is contained in an amount of 10 - 500 % by weight of the phenolic substance.
Claim 4
Dependent Claim
36 words
A heat sensitive recording material according to claim 1, wherein said recording material has only one heat sensitive layer containing two kinds of the chromogenic substances and the phenolic substances, respectively and the organic amine derivative.
Claim 5
Dependent Claim
21 words
A heat sensitive recording material according to claim 1, wherein the adjacent layer is an intermediate layer containing the decolorizing agent.
Claim 6
Dependent Claim
26 words
A heat sensitive recording material according to claim 1, wherein said recording material comprises two heat sensitive layers, one of which contains the organic amine derivative.
Claim 7
Dependent Claim
21 words
A heat sensitive recording material according to claim 1 wherein said organic amine derivative is a guanidine derivative of the formula:
Claim 8
Dependent Claim
34 words
A heat sensitive recording material according to claim 6 wherein R5 is hydrogen, lower alkyl, cyclic alkyl, aryl, aryl substituted with lower alkyl, alkoxy, nitro, or halogen aralkyl, amino, alkylamino, acylamino, carbamoylamino or benzimidazole.
Claim 9
Dependent Claim
19 words
A heat sensitive recording material according to claim 7, wherein said guanidine derivative contains at least 2 cyclohexyl groups.
Claim 10
Dependent Claim
25 words
A heat sensitive recording material according to claim 6 wherein said guanidine is contained in an amount of 10-500% by weight of the phenolic substance.
Claim 11
Dependent Claim
19 words
A heat sensitive recording material according to claim 9 which forms color at a temperature of at least 90*C.
References Cited (Backward Citations)
US3473945A
Cited
US3746675A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |