Patent US3222169A successfully refreshed from Google Patents.
US3222169A
Expired / Lapsed
US
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Photographic products, compositions and processes employing azo dye developers
Assignee: Polaroid Corp
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Filing: 1962-05-08
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Granted: 1965-12-07
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Expires: 1982-05-08
Abstract
No abstract record available.
Inventors
- 👤 Green Milton
- 👤 Howard G Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:22
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/02; G03C8/08; G03C8/10; G03C8/12; G03C8/14; G03C8/16; G03C8/18; C; C09; C09B; C09B31/00; C09B31/02; C09B39/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
33 words
IN A PROCESS OF FORMING A PHOTOGRAPHIC IMAGE IN COLOR, THE STEPS WHICH COMPRISE DEVELOPING AN EXPOSED SILVER HALIDE EMULSION WITH AN AQUEOUS ALKALINE SOLUTION CONTAINING AN AZO DYE DEVELOPER OF THE FORMULA:
References Cited (Backward Citations)
GB682665A
Cited
US2612448A
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US2968554A
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US3019124A
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US2997390A
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US2983606A
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US3043690A
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US3134672A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |