US3269840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and material for surface brightening layers containing gelatin as the binding agent using anionic water-soluble diaminostilbene fluorescent compounds
Assignee: Gevaert Photo Producten NV
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Filing: 1964-03-27
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Granted: 1966-08-30
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Expires: 1984-03-27
Abstract
No abstract record available.
Inventors
- 👤 Pattyn Hendrik Adolf
- 👤 Koerber Willem Karel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:58
CPC Classifications
A; A23; A23B; A23B4/00; A23B4/06; A23B4/066; A23B4/068; D; D21; D21H; D21H21/00; D21H21/14; D21H21/30; G; G03; G03C; G03C1/00; G03C1/76; G03C1/775; G03C1/815; G03C1/8155; G03C5/00; G03C5/26; G03C5/29; G03C5/305; Y; Y10; Y10S; Y10S430/00; Y10S430/134
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A PHOTOGRAPHIC MATERIAL COMPRISING A SUPPORT BEARING A LAYER OF BARYTA COATING CONTAINING GELATIN AS THE ESSENTIAL BINDING AGENT AND AT LEAST ONE GELATIN SILVER HALIDE EMULSION LAYER CONTAINING GELATIN AS THE ESSENTIAL BINDING AGENT, SAID MATERIAL BEING CHARACTERIZED IN THAT AT LEAST ONE OF SAID LAYERS HAS HOMOGENEOUSLY DISTRIBUTED THROUGH THE GELATIN THEREOF AN ANIONIC WATER-SOLUBLE 4,4''DIMINOSTILBENE FLUORESCENT COMPOUND ADAPTED FOR OPTICALLY BRIGHTENING SAID MATERIAL, SAID FLUORESCENT COMPOUND BEING INCORPORATED IN SAID GELATIN IN THE DISSOLVED STATE AND ONE OF SAID LAYERS HAS HOMOGENUOUSLY DISTRIBUTED THROUGHOUT THE GELATIN THEREOF A WATER-SOLUBLE VINYL POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYVINYL PYRROLIDONE, POLYVINYL-2-OXAZOLIDONE, AND A VINYL PYRROLIDONE-VINYL ACETATE COPOLYMER, SAID POLYMER BEING INCORPORATED IN SAID GELATIN IN THE DISSOLVED STATE WHEREBY THE BRIGHTNESS OF SAID MATERIAL IS ENHANCED.
Claim 2
Dependent Claim
128 words
A PHOTOGRAPHIC MATERIAL COMPRISING A SUPPORT BEARING A LAYER OF BARYTA COATING CONTAINING GELATIN AS THE ESSENTIAL BINDING AGENT AND AT LEAST ONE GELATIN SILVER HALIDE EMULSION LAYER CONTAINING GELATIN AS THE ESSENTIAL BINDING AGENT, SAID MATERIAL BEING CHARACTERIZED IN THAT AT LEAST ONE OF SAID LAYERS HAS HOMOGENEOUSLY DISTRIBUTED THROUGH THE GELATIN THEREOF AN ANIONIC WATER-SOLUBLE 4,4''DIMINOSTILBENE FLUORESCENT COMPOUND ADAPTED FOR OPTICALLY BRIGHTENING SAID MATERIAL, SAID FLUORESCENT COMPOUND BEING INCORPORATED IN SAID GELATIN IN THE DISSOLVED STATE AND ONE OF SAID LAYERS HAS HOMOGENUOUSLY DISTRIBUTED THROUGHOUT THE GELATIN THEREOF A WATER-SOLUBLE VINYL POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYVINYL PYRROLIDONE, POLYVINYL-2-OXAZOLIDONE, AND A VINYL PYRROLIDONE-VINYL ACETATE COPOLYMER, SAID POLYMER BEING INCORPORATED IN SAID GELATIN IN THE DISSOLVED STATE WHEREBY THE BRIGHTNESS OF SAID MATERIAL IS ENHANCED.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-29 | 1970-02-28 | 1970-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-29 | 1974-02-28 | 1974-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-29 | 1978-02-28 | 1978-08-30 | $7700.00 | Window Closed / Lapsed |