Patent US2394401A successfully refreshed from Google Patents.
Patent US3853584A successfully refreshed from Google Patents.
US3853584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of photographic materials
Assignee: Fujifilm Holdings Corp
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Filing: 1973-02-12
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Granted: 1974-12-10
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Expires: 1993-02-12
Abstract
Abstract An improvement in adhesion strength between a polystyrene resin support and a gelatin-containing photographic emulsion layer is attained by the pretreatment of the support in two steps in which the first step comprises a surface-roughening treatment of the polystyrene support and the second step comprises a subsequent flame-treatment of the roughened polystyrene support carried out by contacting the roughened surface of the support with a flame from a combustible gas burner.
Inventors
- 👤 S Tatsuta
- 👤 W Ueno
- 👤 N Minagawa
- 👤 H Kurabayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:00
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/02; B; B29; B29C; B29C59/00; B29C59/08; B29C71/00; B29C71/0009; G; G03; G03C; G03C1/00; G03C1/76; G03C1/795; G03C1/91; G03C1/915; B29K; B29K2025/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
79 words
A PROCESS FOR THE PREPARATION OF A PHOTOGRAPHIC MATERIAL WHICH CONSISTS ESSENTIALLY OF A COMBINATION IN SEQUENCE OF THE STEPS OF FIRSTLY FORMING A PLURALITY OF MINUTE PORES HAVING A DIAMETER AND DEPTH OF FROM 0.1$ TO 60$ IN THE SURFACE OF A POLYETYRENE SUPPORT BY ROUGHENING, SECONDLY SUBJECTING THE ROUGHENED SURFACE O THE POLYSTYRENE SUPPORT TO FLAMETREATMENT, COATING THE RESULTING FLAME-TREATED SURFACE OF THE POLYSTYRENE SUPPORT WITH AN EMULSION OR SUSPENSION CONTAINING GELATIN, AND DRYING THE RESULTING COATING.
Claim 2
Dependent Claim
79 words
A PROCESS FOR THE PREPARATION OF A PHOTOGRAPHIC MATERIAL WHICH CONSISTS ESSENTIALLY OF A COMBINATION IN SEQUENCE OF THE STEPS OF FIRSTLY FORMING A PLURALITY OF MINUTE PORES HAVING A DIAMETER AND DEPTH OF FROM 0.1$ TO 60$ IN THE SURFACE OF A POLYETYRENE SUPPORT BY ROUGHENING, SECONDLY SUBJECTING THE ROUGHENED SURFACE O THE POLYSTYRENE SUPPORT TO FLAMETREATMENT, COATING THE RESULTING FLAME-TREATED SURFACE OF THE POLYSTYRENE SUPPORT WITH AN EMULSION OR SUSPENSION CONTAINING GELATIN, AND DRYING THE RESULTING COATING.
Claim 3
Dependent Claim
58 words
A process as claimed in claim 1 where the roughening is performed by contacting the polystyrene with a solvent which dissolves or swells the surface of the polystyrene to provide a swollen surface layer and then contacting the polystyrene with a non-solvent for the polystyrene which is miscible with the solvent, whereby the swollen surface layer is coagulated.
Claim 4
Dependent Claim
13 words
A process as claimed in claim 1 where the polystyrene is a homopolymer.
Claim 5
Dependent Claim
19 words
A process as claimed in claim 1 where the polystyrene is a styrene-butadiene, styrene-acrylonitrile, styrene-propylene or styrene-methyl methacrylate copolymer.
Claim 6
Dependent Claim
14 words
A process as claimed in claim 1 where the polystyrene contains a white pigment.
Claim 7
Dependent Claim
30 words
A process as claimed in claim 1 where the flame treatment is accomplished by continuously passing the polystyrene in web form in contact with a flowing fuel gas/oxygen combustion flame.
Claim 8
Dependent Claim
16 words
A process as claimed in claim 6 where the emulsion or suspension contains a silver halide.
Claim 9
Dependent Claim
22 words
A process as claimed in claim 6 where the emulsion or suspension contains developing nuclei for a silver salt diffusion transfer process.
References Cited (Backward Citations)
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |