US3698900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diffusion transfer process utilizing 2-mercapto imidazoles
Assignee: Polaroid Corp
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Filing: 1971-08-23
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Granted: 1972-10-17
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Expires: 1991-08-23
Abstract
Abstract 2-MERCAPTO IMIDAZOLES ARE UTILLIZED IN DIFFUSION TRANSFER PROCESSES TO GIVE POSITIVE TRANSFER PRINTS OF IMPROVED QUALITY OVER A BROAD RANGE OF PROCESSSING TEMPERATURES.
Inventors
- 👤 Edward J Johnson Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 00:58
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/24; G03C8/243
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) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |