US3266895A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for processing multilayer color film
Assignee: Eastman Kodak Co
•
Filing: 1963-11-14
•
Granted: 1966-08-16
•
Expires: 1983-11-14
Abstract
No abstract record available.
Inventors
- 👤 Philip E Perkins
- 👤 Herbert L Rees
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:05
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/50; G03C7/00; G03C7/30; G03C7/407; G03C7/413
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
219 words
IN THE REVERSAL PROCESS OF PRODUCING A COLOR RECORD IN A PHOTOEXPOSED PHOTOGRAPHIC ELEMENT HAVING ON A SUPPORT A PLURALITY OF SILVER HALIDE EMULSION LAYERS SENSITIVE TO DIFFERENT REGIONS OF THE VISIBLE SPECTRUM, SAID REVERSAL PROCESS INCLUDING THE STEPS OF PRODUCING A NEGATIVE SILVER IMAGE IN AT LEAST ONE OF SAID EMULSION LAYERS BY DEVELOPMENT IN A BLACK-AND-WHITE PHOTOGRAPHIC DEVELOPER, FOLLOWED BY AT LEAST ONE REVERSAL RE-EXPOSURE OF PREVIOUSLY UNEXPOSED SILVER HALIDE AND DEVELOPING IN A PHOTOGRAPHIC COLOR DEVELOPER IN THE PRESENCE OF A COLOR FORMING COUPLER, THE IMPROVEMENT COMPRISING AFTER SAID RE-EXPOSURE AND DEVELOPMENT IN A COLOR DEVELOPER, THE STEP OF ELIMINATING A LAST REVERSAL RE-EXPOSURE BY IMBIBING IN SAID PHOTOGRAPHIC ELEMENT AN AQUEOUS SOLUTION CONTAINING A BORON COMPOUND NUCLEATING AGENT SELECTED FROM THE CLASS CONSISTING OF ALKALI METAL BOROHYDRIDES, BORAZINES, AMINE BORANES, HYDRAZINE BORANES, PHOSPHINE BORANES, ARSINE BORANES, AND STIBINE BORANES, AND A 1,4 DIHYDROXYBENZENE DEVELOPING AGENT WHICH CONTAINS A SIDE CHAIN CONTAINING AT LEAST 4 CARBON ATOMS, SAID 1,4-DIHYDROXYBENZENE COMPOUND BEING RENDERED NON-DIFFUSIBLE BY SAID SIDE CHAIN AND THEREBY BEING CONFINED SUBSTANTIALLY TO THE OUTERMOST OF SAID EMULSION LAYERS WITH RESPECT TO SAID SUPPORT, SAID BORON COMPOUND NUCLEATING AGENT NUCLEATING SUBSTANTIALLY ALL PREVIOUSLY UNEXPOSED SILVER HALIDE AND SAID 1,4-DIHYDROXYBENZENE COMPOUND DEVELOPING TO METALLIC SILVER SUBSTANTIALLY ONLY THE PREVIOUSLY UNEXPOSED SILVER HALIDE IN SAID OUTERMOST EMULSION LAYER.
Claim 2
Dependent Claim
219 words
IN THE REVERSAL PROCESS OF PRODUCING A COLOR RECORD IN A PHOTOEXPOSED PHOTOGRAPHIC ELEMENT HAVING ON A SUPPORT A PLURALITY OF SILVER HALIDE EMULSION LAYERS SENSITIVE TO DIFFERENT REGIONS OF THE VISIBLE SPECTRUM, SAID REVERSAL PROCESS INCLUDING THE STEPS OF PRODUCING A NEGATIVE SILVER IMAGE IN AT LEAST ONE OF SAID EMULSION LAYERS BY DEVELOPMENT IN A BLACK-AND-WHITE PHOTOGRAPHIC DEVELOPER, FOLLOWED BY AT LEAST ONE REVERSAL RE-EXPOSURE OF PREVIOUSLY UNEXPOSED SILVER HALIDE AND DEVELOPING IN A PHOTOGRAPHIC COLOR DEVELOPER IN THE PRESENCE OF A COLOR FORMING COUPLER, THE IMPROVEMENT COMPRISING AFTER SAID RE-EXPOSURE AND DEVELOPMENT IN A COLOR DEVELOPER, THE STEP OF ELIMINATING A LAST REVERSAL RE-EXPOSURE BY IMBIBING IN SAID PHOTOGRAPHIC ELEMENT AN AQUEOUS SOLUTION CONTAINING A BORON COMPOUND NUCLEATING AGENT SELECTED FROM THE CLASS CONSISTING OF ALKALI METAL BOROHYDRIDES, BORAZINES, AMINE BORANES, HYDRAZINE BORANES, PHOSPHINE BORANES, ARSINE BORANES, AND STIBINE BORANES, AND A 1,4 DIHYDROXYBENZENE DEVELOPING AGENT WHICH CONTAINS A SIDE CHAIN CONTAINING AT LEAST 4 CARBON ATOMS, SAID 1,4-DIHYDROXYBENZENE COMPOUND BEING RENDERED NON-DIFFUSIBLE BY SAID SIDE CHAIN AND THEREBY BEING CONFINED SUBSTANTIALLY TO THE OUTERMOST OF SAID EMULSION LAYERS WITH RESPECT TO SAID SUPPORT, SAID BORON COMPOUND NUCLEATING AGENT NUCLEATING SUBSTANTIALLY ALL PREVIOUSLY UNEXPOSED SILVER HALIDE AND SAID 1,4-DIHYDROXYBENZENE COMPOUND DEVELOPING TO METALLIC SILVER SUBSTANTIALLY ONLY THE PREVIOUSLY UNEXPOSED SILVER HALIDE IN SAID OUTERMOST EMULSION LAYER.
References Cited (Backward Citations)
US2865747A
Cited
US2984567A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-15 | 1970-02-14 | 1970-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-15 | 1974-02-14 | 1974-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-15 | 1978-02-14 | 1978-08-16 | $7700.00 | Window Closed / Lapsed |