US3597200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color diffusion transfer processes and products utilizing metal-complexed azomethine dye-developers
Assignee: Polaroid Corp
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Filing: 1969-06-04
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Granted: 1971-08-03
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Expires: 1989-06-04
Abstract
Abstract NOVEL METAL-COMPLEXED AZOMETHINE DYES WHICH ARE ALSO SILVER HALIDE DEVELOPING AGENTS, NOVEL NON-COMPLEXED AZOMETHINES USEFUL IN THE PREPARATION OF THE SAME, AND NOVEL PHOTOGRAPHIC SYSTEMS AND PROCEDURES REMPLOYING THE AFOREMENTIONED METAL COMPLEXES TO OBTAIN COLOR IMAGES, PARTICULARLY SYSTEMS AND PROCEDURES FOR PREPARING COLOR IMAGES BY DIFFUSION TRANSFER.
Inventors
- 👤 Elbert M Idelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:31
CPC Classifications
C; C09; C09B; C09B55/00; G; G03; G03C; G03C8/00; G03C8/02; G03C8/08; G03C8/10; G03C8/12; G03C8/14; G03C8/16; G03C8/18
Claims Analysis
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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) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |