US4410619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic material
Assignee: Mitsubishi Paper Mills Ltd
•
Filing: 1982-04-08
•
Granted: 1983-10-18
•
Expires: 2002-04-08
Abstract
Abstract In a photographic material, comprising a photographic constitution layer or layers containing a silver halide developer on a support obtained by coating base paper with a film-forming resin, the use of the base paper treated with a sulfinic acid or a salt thereof prevents the discoloration of the photographic material by the influence of the silver halide developer.
Inventors
- 👤 Massashi Kubbota
- 👤 Touru Noda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:37
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/775
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
107 words
A photographic material comprising a support and, provided thereon, a photographic constitution layer or layers at least one of which contains at least one silver halide developer characterized in that said support is obtained by coating a film-forming resin on base paper surface-treated with at least one compound expressed by the general formula (I): R--SO.sub.2 M (I) wherein R represents an alkyl group, substituted alkyl group, aryl group or substituted aryl group; M represents a hydrogen atom, alkali metal atom, alkaline earth metal atom or ammonium, the amount of the compound expressed by the general formula (I) being 50-5000 mg per m 2 of the base paper.
Claim 2
Dependent Claim
107 words
A photographic material comprising a support and, provided thereon, a photographic constitution layer or layers at least one of which contains at least one silver halide developer characterized in that said support is obtained by coating a film-forming resin on base paper surface-treated with at least one compound expressed by the general formula (I): R--SO.sub.2 M (I) wherein R represents an alkyl group, substituted alkyl group, aryl group or substituted aryl group; M represents a hydrogen atom, alkali metal atom, alkaline earth metal atom or ammonium, the amount of the compound expressed by the general formula (I) being 50-5000 mg per m 2 of the base paper.
Claim 3
Dependent Claim
29 words
A photographic material of claim 1, wherein the compound expressed by the general formula is selected from the group consisting of benzenesulfinic acid, p-toluenesulfinic acid, and a salt thereof.
Claim 4
Dependent Claim
23 words
A photographic material of claim 1, wherein at least one of photographic constitution layer or layers is a silver halide photographic emulsion layer.
Claim 5
Dependent Claim
23 words
A photographic material of claim 3, wherein the layer containing the silver halide developer is at least the silver halide photographic emulsion layer.
Claim 6
Dependent Claim
28 words
A photographic material of claim 4, wherein the silver halide developer is selected from the group consisting of a hydroquinone compound, a pyrazolidone compound and a mixture thereof.
Claim 7
Dependent Claim
27 words
A photographic material of claim 5, includes a hydroquinone and wherein the hydroquinone compound is selected from the group consisting of hydroquinone, methylhydroquinone, 2,5-di-tert-butylhydroquinone and hydroquinone monobenzoate.
Claim 8
Dependent Claim
16 words
A photographic material of claim 5, includes a pyrazolidone and wherein the pyrazolidone compound is 1-phenyl-3-pyrazolidone.
Claim 9
Dependent Claim
18 words
A photographic material of claim 5, wherein the silver halide developer is a mixture of methylhydroquinone with 1-phenyl-3-pyrazolidone.
Claim 10
Dependent Claim
12 words
A photographic material of claim 1, wherein the film-forming resin is polyethylene.
Claim 11
Dependent Claim
18 words
A photographic maerial of claim 1, wherein a back coat layer is provided on the back side thereof.
Claim 12
Dependent Claim
19 words
A photographic material of claim 1, which is used as an image receiving material for the diffusion transfer process.
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) | 1986-10-17 | 1987-04-18 | 1987-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-17 | 1991-04-18 | 1991-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-17 | 1995-04-18 | 1995-10-18 | $7700.00 | Window Closed / Lapsed |