US3129101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-sensitive copy-sheet
Assignee: 3M Co
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Filing: 1961-11-01
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Granted: 1964-04-14
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Expires: 1981-11-01
Abstract
No abstract record available.
Inventors
- 👤 Wesley R Workman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:27
CPC Classifications
C; C07; C07D; C07D277/00; C07D277/60; C07D277/62; C07D277/68; C07D277/82; G; G03; G03C; G03C1/00; G03C1/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A HEAT-SENSITIVE COPY-SHEET PRODUCT USEFUL IN THE THERMOGRAPHIC REPRODUCTION OF DIFFERENTIALLY RADIATIONABSORPTIVE GRAPHIC ORIGINALS AND CAPABLE OF PROVIDING PERMANENT REPRODUCTIONS STABLE AGAINST FURTHER HEATING, SAID COPY-SHEET PRODUCT INCLUDING A VISIBLY HEAT-SENSITIVE LAYER CONTAINING, IN INTIMATE ASSOCIATION, A NORMALLY SOLID CONDENSATION COMPOSITE OF A HETEROCYCLIC HYDRAZONE AND AN AMINE-REACTIVE ORGANIC COMPOUND, AND A PHOTOSENSITIVE N-HALO-SULFONANILIDE OXIDIZING AGENT SOLID AT TEMPERATURES BELOW ABOUT 55*C. AND WHICH IS RENDERED INACTIVE AS AN OXIDIZING AGENT BY EXPOSURE TO ACTINIC RADIATION; AND SAID LAYER INCLUDING AN AZO COUPLER COMPONENT.
Claim 2
Dependent Claim
84 words
A HEAT-SENSITIVE COPY-SHEET PRODUCT USEFUL IN THE THERMOGRAPHIC REPRODUCTION OF DIFFERENTIALLY RADIATIONABSORPTIVE GRAPHIC ORIGINALS AND CAPABLE OF PROVIDING PERMANENT REPRODUCTIONS STABLE AGAINST FURTHER HEATING, SAID COPY-SHEET PRODUCT INCLUDING A VISIBLY HEAT-SENSITIVE LAYER CONTAINING, IN INTIMATE ASSOCIATION, A NORMALLY SOLID CONDENSATION COMPOSITE OF A HETEROCYCLIC HYDRAZONE AND AN AMINE-REACTIVE ORGANIC COMPOUND, AND A PHOTOSENSITIVE N-HALO-SULFONANILIDE OXIDIZING AGENT SOLID AT TEMPERATURES BELOW ABOUT 55*C. AND WHICH IS RENDERED INACTIVE AS AN OXIDIZING AGENT BY EXPOSURE TO ACTINIC RADIATION; AND SAID LAYER INCLUDING AN AZO COUPLER COMPONENT.
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) | 1967-04-14 | 1967-10-14 | 1968-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-14 | 1971-10-14 | 1972-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-14 | 1975-10-14 | 1976-04-14 | $7700.00 | Window Closed / Lapsed |