US3695885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat developable diazotype copying material
Assignee: Individual
•
Filing: 1970-06-05
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Granted: 1972-10-03
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Expires: 1990-06-05
Abstract
Abstract A HEAT DEVELOPABLE DIAZOTYPE COPYING MATERIAL COMPRISING A SUPPORT AND A LIGHT-SENSITIVE LAYER FORMED ONTO ONE SURFACE OF SAID SUPPORT. SAID LAYER CONTAINING A COUPLER WHICH ACTIVATED DURING THE HEAT DEVELOPMENT OF THE COPYING MATERIAL AND AT LEAST TWO KINDS OF DIAZONIUM COMPOUNDS FORMING A BLACK AZO DYE AS A RESSULTOF A REACTION BETWEEN SAID COUPLER AND SAID DIAZONIUM COMPOUNDS.
Inventors
- 👤 Shoji Maryama
- 👤 Tadashi Saito
- 👤 Tomiaki Asami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:10
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; G03C1/58; G03C1/585
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |