Patent US3764328A successfully refreshed from Google Patents.
US3764328A
Expired / Lapsed
US
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Photothermic silver halide element containing an organic mercuric soap and a color forming coupler
Assignee: 3M Co
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Filing: 1972-01-03
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Granted: 1973-10-09
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Expires: 1992-01-03
Abstract
Abstract LIGHT-SENSITIVE HEAT DEVELOPABLE SHEET MATERIALS CONTAINING ORGANIC SILVER SALT AND PHOTOSENSITIVE SILVER HALIDE AND CAPABLE ON EXPOSURE AND DEVELOPMENT OF FORMING CLEAR, BRIGHT AND INTENSE COLOR IMAGES CONTAIN BETWEEN .5 AND .9 EQUIVALENT OF MERCURY AND UP TO 11 MOLS OF COLOR COUPLER PER MOL OF SILVER AND ARE DEVELOPED BY HEATING IN PRESENCE OF A P-PHENYLENEDIAMINE REDUCING AGENT FOR SILVER ION.
Inventors
- 👤 S Birkeland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:18
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/494; G03C1/498; G03C5/00; G03C5/26; G03C5/261
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) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |