US3065075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic products and processes utilizing triptycene diol silver halide developers
Assignee: Polaroid Corp
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Filing: 1960-07-13
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Granted: 1962-11-20
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Expires: 1980-07-13
Abstract
No abstract record available.
Inventors
- 👤 Dershowitz Samuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:02
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/54; C07F9/5442; G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/30; G03C5/3021
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
IN A PROCESS OF FORMING A SILVER TRANSFER PRINT BY A DIFFUSION-TRANSFER REVERSAL PROCESS WHEREIN THE LATENT IMAGE IS DEVELOPED BY AN AQUEOUS COMPOSITION COMPRISING A SILVER HALIDE DEVELOPING AGENT, AN ALKALI AND A SILVER HALIDE SOLVENT, AND UNEXPOSED SILVER HALIDE IS TRANSFERRED TO AN IMAGE-RECEIVING LAYER TO FORM A POSITIVE SILVER IMAGE; THE IMPROVEMENT WHICH COMPRISES EFFECTING SAID DEVELOPMENT BY USING A TRIPTYCENE DIOL DEVELOPING AGENT.
Claim 2
Dependent Claim
67 words
IN A PROCESS OF FORMING A SILVER TRANSFER PRINT BY A DIFFUSION-TRANSFER REVERSAL PROCESS WHEREIN THE LATENT IMAGE IS DEVELOPED BY AN AQUEOUS COMPOSITION COMPRISING A SILVER HALIDE DEVELOPING AGENT, AN ALKALI AND A SILVER HALIDE SOLVENT, AND UNEXPOSED SILVER HALIDE IS TRANSFERRED TO AN IMAGE-RECEIVING LAYER TO FORM A POSITIVE SILVER IMAGE; THE IMPROVEMENT WHICH COMPRISES EFFECTING SAID DEVELOPMENT BY USING A TRIPTYCENE DIOL DEVELOPING AGENT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-11-19 | 1966-05-21 | 1966-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-19 | 1970-05-21 | 1970-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-19 | 1974-05-21 | 1974-11-20 | $7700.00 | Window Closed / Lapsed |