Patent US3573046A successfully refreshed from Google Patents.
US3573046A
Expired / Lapsed
US
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Heat treatment process to control contrast in nonsilver light sensitive systems
Assignee: Horizons Inc
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Filing: 1968-05-01
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Granted: 1971-03-30
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Expires: 1988-05-01
Abstract
Abstract THE CONTROL OF CONTRAST AND/OR GAMMA OF A NONSILVER PHOTOSENSITIVE FILM BY CONTROLLING THE TEMPERATURE OF THE FILM DURING OPTICAL DEVELOPMENT OF THE SAME.
Inventors
- 👤 Richard A Fotland
- 👤 Frederick N Robertson
- 👤 James M Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:32
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/56; G03C1/00; G03C1/675
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) | 1974-03-29 | 1974-09-28 | 1975-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-29 | 1978-09-28 | 1979-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-29 | 1982-09-28 | 1983-03-30 | $7700.00 | Window Closed / Lapsed |