Patent US5573269A successfully refreshed from Google Patents.
US3909441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition for forming ultraviolet absorbing filter layer
Assignee: Mitsubishi Paper Mills Ltd
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Filing: 1972-09-27
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Granted: 1975-09-30
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Expires: 1992-09-27
Abstract
Abstract A composition for forming an ultraviolet absorbing filter layer comprising a dispersion in a hydrophilic binder of a complex formed between a fluorescent brightening agent containing an anionic group and being diffusible in an aqueous medium and a hydrophilic polymer containing a cationic nitrogen-containing active group. A photographic material containing this layer is also provided.
Inventors
- 👤 Yasushi Ohyama
- 👤 Hideo Sumitani
- 👤 Sadayuki Miyazawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:39
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/815; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2989
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
140 words
A COMPOSITION FOR FORMING AN ULTRAVIOLET ABSORBING FILTER LAYER COMPRISING A DISPERSION IN A HYDROPHILIC BINDER, SAID HYDROPHILIC BINDER BEING AT LEAST ONE MEMBER SELECTED FROM THE GEROUP CONSISTING OF GELATIN, PHTHALIC ACID MODIFIED GELATIN, STARCH, HYDROXYPROPYL STARCH, GUM ARABIC, POLYVINYL ALCOHOL, POLYACRYLAMIDE, POLYVINYL PYRROLIDONE, A COPOLYMER OF STYRENE AND MALEIC ANHYDRIDE, A COPOLYMER OF VINYL METHYL ETHER AND MALEIC ANHYDRIDE, HYDROXYETYL CELLULOSE, CARBOXYMETHYL CELLULOSE, ETHYL CELLULOSE, AND MIXTURE THEREOF, OF A COMPLEX FORMED BETWEEN A STILBENE TYPE FLUORESCENT BRIGHTENING AGENT CONTAINING AN ANIONIC GROUP, WHICH IS DIFFUSIBLE IN AN AQUEOUS MEDIUM, AND A HYDROPHILIC POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYVINYL-BENZYL-TRIMETHYL-AMMONIUM CHLORIDE, POLYVINYL-BENZYL-TTTRIETHYL-AMMONIUM CHLORIDE, POLYVINYL-BENZYL-MORPHOLIUM-METHYL CHLORIDE, POLYVINYL-BENZYL-CYCLOHEXYL-AMMONIUM CHLORIDE, POLYVINYL-BENZYL-PICOLINIUM CHLORIDE, POLY-4-VINYL-BENZYL-TRIETHANOL-AMMONIUM CHLORIDE, THE METHYL CHLORIDE SALT OF METHYLAMINO DIETHANOL MONOESTER OF POLYMETHACRYLIC ACID, THE BENZYL CHLORIDE SALT OF THE DIMETHYLAMINO-ETHANOL ESTER OF POLYMETHACRYLIC ACID, AND POLY(N, N-DIMETHYL-3,5-METHYLENE-PIPERIDINIUM CHLORIDE.
Claim 2
Dependent Claim
140 words
A COMPOSITION FOR FORMING AN ULTRAVIOLET ABSORBING FILTER LAYER COMPRISING A DISPERSION IN A HYDROPHILIC BINDER, SAID HYDROPHILIC BINDER BEING AT LEAST ONE MEMBER SELECTED FROM THE GEROUP CONSISTING OF GELATIN, PHTHALIC ACID MODIFIED GELATIN, STARCH, HYDROXYPROPYL STARCH, GUM ARABIC, POLYVINYL ALCOHOL, POLYACRYLAMIDE, POLYVINYL PYRROLIDONE, A COPOLYMER OF STYRENE AND MALEIC ANHYDRIDE, A COPOLYMER OF VINYL METHYL ETHER AND MALEIC ANHYDRIDE, HYDROXYETYL CELLULOSE, CARBOXYMETHYL CELLULOSE, ETHYL CELLULOSE, AND MIXTURE THEREOF, OF A COMPLEX FORMED BETWEEN A STILBENE TYPE FLUORESCENT BRIGHTENING AGENT CONTAINING AN ANIONIC GROUP, WHICH IS DIFFUSIBLE IN AN AQUEOUS MEDIUM, AND A HYDROPHILIC POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYVINYL-BENZYL-TRIMETHYL-AMMONIUM CHLORIDE, POLYVINYL-BENZYL-TTTRIETHYL-AMMONIUM CHLORIDE, POLYVINYL-BENZYL-MORPHOLIUM-METHYL CHLORIDE, POLYVINYL-BENZYL-CYCLOHEXYL-AMMONIUM CHLORIDE, POLYVINYL-BENZYL-PICOLINIUM CHLORIDE, POLY-4-VINYL-BENZYL-TRIETHANOL-AMMONIUM CHLORIDE, THE METHYL CHLORIDE SALT OF METHYLAMINO DIETHANOL MONOESTER OF POLYMETHACRYLIC ACID, THE BENZYL CHLORIDE SALT OF THE DIMETHYLAMINO-ETHANOL ESTER OF POLYMETHACRYLIC ACID, AND POLY(N, N-DIMETHYL-3,5-METHYLENE-PIPERIDINIUM CHLORIDE.
Claim 3
Dependent Claim
50 words
The composition of claim 1, which is prepared by reacting a phthalic acid derivative of gelatin, polyvinyl alcohol or starch with the hydrophilic polymer in an aqueous solution of the hydrophilic binder to form fine particles of coacervate, and then complexing the fluorescent brightening agent with the resulting coacervate particles.
Claim 4
Dependent Claim
33 words
The composition of claim 2, wherein the coacervate is formed after incorporation of a latex of a hydrophobic polymer in the aqueous solution of the hydrophilic binder, thereby to form microcapsule-type coacervate particles.
Claim 5
Dependent Claim
30 words
The composition of claim 1, wherein the content of the fluorescent brightening agent in the filter layer is from 0.1 to 2 g per square meter of the filter layer.
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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |