US3575703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic diffusion transfer product and process
Assignee: Eastman Kodak Co
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Filing: 1968-05-17
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Granted: 1971-04-20
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Expires: 1988-05-17
Abstract
Abstract A PHOTOGRAPHIC ELEMENT HAVING A SUPPORT CARRYING A HARDENED SILVER PRECIPITATING STRATUM CONTAINING SILVER PRECIPITATING NUCLEI AND AN OVERLYING LIGHT SENSTIVE SILVER HALIDE STRATUM COMPRISING CYANOETHYLATED GELATIN. A SILVER IMAGE IS FORMED IN THE SILVER PRECIPITATING STRATUM BY DIFFUSION TRANSFER. THE OVERLYING LIGHT SENSITIVE LAYER IS EASILY REMOVED BECAUSE THE CYANOETHYLATED GELATIN IS NOT HARDENED BY HARDNER WHICH MAY MIGRATE THERETO.
Inventors
- 👤 Malcolm Lawrence Judd
- 👤 Robert Leslie Schneider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:01
CPC Classifications
G; G03; G03C; G03C8/00; 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) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |