Patent US3676142A successfully refreshed from Google Patents.
US3676142A
Expired / Lapsed
US
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Method of incorporating photographic ingredients into photographic colloid compositions
Assignee: Agfa Gevaert NV
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Filing: 1969-09-10
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Granted: 1972-07-11
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Expires: 1989-09-10
Abstract
Abstract A COLOR-COUPLING OR MASK-FORMING COMPOUND IS INHIBITED AGAINST DIFFUSION FROM THE LAYER OF A COLOR PHOTOGRAPHIC MATERIAL IN WHICH IS IN INCORPORATED BY MEANS OF A WATER-INSOLUBLE CHEMICALLY INERT WAX DISPERSED UNIFORMLY THROUGHOUT THE LAYER AND HAVING THE COLOR-COUPLING OR MASK-FORMING COMPOUND IN CONTACT THEREWITH, PREFERABLY CONTAINED IN FINELY DIVIDED PARTICLES THEREOF. ANY OF A VARIETY OF NATURAL OR SYNTHETIC WAXES CAN BE EMPLOYED , PREFERABLY HAVING A LOW REFRACTIVE INDEX, AND THE WAX AND THE COLOR-COUPLING OR MASK-FORMING COMPOUND CAN BE INCORPORATED INTO THE LAYER-FORMING COMPOSITION IN A VARIETY OF WAYS.
Inventors
- 👤 Jan Albert Carpentier
- 👤 Alfons Jozef De Pauw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:55
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/3003; G03C7/388
Claims Analysis
Total Claims: 0
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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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |