Patent US3730716A successfully refreshed from Google Patents.
US3730716A
Expired / Lapsed
US
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Silver image stabilization with noble metal compounds and alpha,beta-enediol developer
Assignee: Polaroid Corp
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Filing: 1971-05-19
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Granted: 1973-05-01
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Expires: 1991-05-19
Abstract
Abstract THE PRESENT INVENTION RELATES TO A NOVEL PHOTOGRAPHIC FILM UNIT ADAPTED TO PROVIDE SILVER IMAGES OF ENHANCED IMAGE STABILITY WHICH COMPRISES PHOTOSENSITIVE SILVER HALIDE, A NOBLE METAL COMPOUND CONTAINING A NOBLE METAL ION BELOW SILVER IN THE ELECTROMOTIVE FORCE SERIES OF ELEMENTS, AND A SILVER HALIDE DEVELOPING AGENT WHOSE OXIDATION PRRODUCT IS SUBSTANTIALLY NONOXIDATIVE TO THE THUS-FORMED SILVER IMAGE FOR A TIME SUFFICIENT TO ENABLE THE NOBLE METAL ION TO CONTACT SAID SILVER IMAGE TO PROVIDE SUSTAINED AND LONG-LASTING STABILIZATION EFFECTS.
Inventors
- 👤 E Land
- 👤 S Bloom
- 👤 L Farney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:42
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/30; G03C5/00; G03C5/26; G03C5/29; G03C5/30; G03C5/40; G03C8/02; G03C8/04; G03C8/06
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) | 1976-04-30 | 1976-10-30 | 1977-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-30 | 1980-10-30 | 1981-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-30 | 1984-10-30 | 1985-05-01 | $7700.00 | Window Closed / Lapsed |