Patent US3925082A successfully refreshed from Google Patents.
US3925082A
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Multicolor screen element containing a hydrophilic colloid treated with a basic dye and zirconium acetate
Assignee: Polaroid Corp
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Filing: 1972-12-29
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Granted: 1975-12-09
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Expires: 1992-12-29
Abstract
Abstract A method of dyeing hydrophilic colloids which comprises contacting said colloids with an aqueous solution of a dye and zirconium acetate. The zirconium acetate functions as a hardener for the colloid. The method of the present invention is particularly suitable for the preparation of additive color screens.
Inventors
- 👤 Herbert L Fielding
- 👤 Samuel H Liggero
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:35
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/30; Y; Y10; Y10S; Y10S430/00; Y10S430/147
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
46 words
A PHOTOGRAPHIC MULTICOLOR SCREEN ELEMENT WHICH COMPRISES, IN COMBINATION, A GEOMETRICALLY REPETITIVE PLURALITY OF CHROMATIC FILTER ELEMENT SERIES; AT LEAST ONE OF SAID CHROMATIC FILTER ELEMENT SERIES COMPRISING FILTER ELEMENTS COMPRISING A HYDROPHILIC COLLOID DYED WITH AN AQUEOUS SOLUTION OF A BASIC DYE AND ZIRCONIUM ACETATE.
Claim 2
Dependent Claim
46 words
A PHOTOGRAPHIC MULTICOLOR SCREEN ELEMENT WHICH COMPRISES, IN COMBINATION, A GEOMETRICALLY REPETITIVE PLURALITY OF CHROMATIC FILTER ELEMENT SERIES; AT LEAST ONE OF SAID CHROMATIC FILTER ELEMENT SERIES COMPRISING FILTER ELEMENTS COMPRISING A HYDROPHILIC COLLOID DYED WITH AN AQUEOUS SOLUTION OF A BASIC DYE AND ZIRCONIUM ACETATE.
Claim 3
Dependent Claim
17 words
A product as defined in claim 1 wherein said chromatic filter elements are in substantially side-by-side relationship.
Claim 4
Dependent Claim
14 words
The product as defined in claim 2 wherein said hydrophilic colloid comprises dichromated gelatin.
Claim 5
Dependent Claim
17 words
A product as defined in claim 1 wherein said filter elements are carried on a transparent support.
Claim 6
Dependent Claim
24 words
A product as defined in claim 1 including a panchromatic photographic emulsion layer on the surface of said chromatic filter elements opposite said support.
Claim 7
Dependent Claim
25 words
A product as defined in claim 5 including a photographic diffusion transfer image-receiving layer on the surface of said chromatic filter elements opposite said support.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-08 | 1979-06-09 | 1979-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-08 | 1983-06-09 | 1983-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-08 | 1987-06-09 | 1987-12-09 | $7700.00 | Window Closed / Lapsed |