Patent US2992121A successfully refreshed from Google Patents.
US2992121A
Expired / Lapsed
US
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Thermosensitive colouring materials
Assignee: Caribonum Ltd
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Filing: 1958-05-07
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Granted: 1961-07-11
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Expires: 1978-05-07
Abstract
No abstract record available.
Inventors
- 👤 Francis Frederick George
- 👤 Seaward John Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:36
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/02; C09D11/03; Y; Y10; Y10T; Y10T442/00; Y10T442/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A COLOURED INK COMPOSITION WHICH IS ADAPTED TO PRODUCE COLOURED WRITTEN COPY MATTER CAPABLE OF BEING COPIED BY A THERMO-SENSITIVE COPYING PROCESS, WHICH INK COMPOSITION CONSISTS ESSENTIALLY OF AN OIL-CONTAINING VEHICLE, AT LEAST ONE CHROMATIC-COLOURED COLOURING MATERIAL IN AN AMOUNT OF FROM 15% TO 30% BY WEIGHT OF THE INK COMPOSITION AND FINELY-DIVIDED ANTIMONY IN AN AMOUNT SUFFICIENT TO GIVE SATISFACTORY THERMOSENSITIVE COPY BY IMPARTING INFRA-RED ABSORPTIVE PROPERTIES TO THE INK COMPOSITION WITHOUT THE ANTIMONY BEING PRESENT IN AN AMOUNT SUFFICIENTLY LARGE TO OBSCURE THE CHROMATIC COLOUR OF THE INK COMPOSITION.
Claim 2
Dependent Claim
91 words
A COLOURED INK COMPOSITION WHICH IS ADAPTED TO PRODUCE COLOURED WRITTEN COPY MATTER CAPABLE OF BEING COPIED BY A THERMO-SENSITIVE COPYING PROCESS, WHICH INK COMPOSITION CONSISTS ESSENTIALLY OF AN OIL-CONTAINING VEHICLE, AT LEAST ONE CHROMATIC-COLOURED COLOURING MATERIAL IN AN AMOUNT OF FROM 15% TO 30% BY WEIGHT OF THE INK COMPOSITION AND FINELY-DIVIDED ANTIMONY IN AN AMOUNT SUFFICIENT TO GIVE SATISFACTORY THERMOSENSITIVE COPY BY IMPARTING INFRA-RED ABSORPTIVE PROPERTIES TO THE INK COMPOSITION WITHOUT THE ANTIMONY BEING PRESENT IN AN AMOUNT SUFFICIENTLY LARGE TO OBSCURE THE CHROMATIC COLOUR OF THE INK COMPOSITION.
References Cited (Backward Citations)
US1885388A
Cited
US1717140A
Cited
US2441945A
Cited
US2435223A
Cited
US2503758A
Cited
US2740895A
Cited
US2936247A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |