Patent US2496940A successfully refreshed from Google Patents.
US2496940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixed grain photographic process
Assignee: Eastman Kodak Co
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Filing: 1948-10-21
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Granted: 1950-02-07
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Expires: 1968-10-21
Abstract
No abstract record available.
Inventors
- 👤 Jr Wesley T Hanson
- 👤 Forrest A Richey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:29
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
THE METHOD OF DEVELOPING A MULTI-COLOR IMAGE IN A PHOTOGRAPHIC EMULSION LAYER CONTAINING DIFFERENTLY-SENSITIZED SILVER BROMIDE AND SILVER CHLORIDE GRAINS, WHICH COMPRISES EXPOSING SAID EMULSION LAYER, DEVELOPING ONLY THE EXPOSED SILVER CHLORIDE GRAINS OF SAID LAYER WITH A COLOR DEVELOPER CONTAINING AN ANTIFOGGANT SELECTED FROM THE CLASS CONSISTING OF 6-NITROBENZIMIDAZOLE, 6 -NITROBENZIMIDAZOLE NITRATE, 5-NITROINDAZOLE, BENZOTRIAZOLE AND 2-AMINO-5-METHYL BENZOTRIA-
Claim 2
Independent Claim
58 words
THE METHOD OF DEVELOPING A MULTI-COLOR IMAGE IN A PHOTOGRAPHIC EMULSION LAYER CONTAINING DIFFERENTLY-SENSITIZED SILVER BROMIDE AND SILVER CHLORIDE GRAINS, WHICH COMPRISES EXPOSING SAID EMULSION LAYER, DEVELOPING ONLY THE EXPOSED SILVER CHLORIDE GRAINS OF SAID LAYER WITH A COLOR DEVELOPER CONTAINING AN ANTIFOGGANT SELECTED FROM THE CLASS CONSISTING OF 6-NITROBENZIMIDAZOLE, 6 -NITROBENZIMIDAZOLE NITRATE, 5-NITROINDAZOLE, BENZOTRIAZOLE AND 2-AMINO-5-METHYL BENZOTRIA-
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) | 1953-02-06 | 1953-08-08 | 1954-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-06 | 1957-08-08 | 1958-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-06 | 1961-08-08 | 1962-02-07 | $7700.00 | Window Closed / Lapsed |