Patent USRE28668E successfully refreshed from Google Patents.
USRE28668E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide emulsions containing alkyl selenols and thiols as antifoggants
Assignee: —
•
Filing: 1975-04-03
•
Granted: 1975-12-30
•
Expires: 1995-04-03
Abstract
Abstract IN WHICH A is a cation, X is sulfur or selenium, R7 is an organic residue; R6 is hydrogen or an organic residue; R8 is an organic residue; Alpha and Beta are each hydrogen, organic residue or the electrons required to form double bonds between the carbon atoms; Y and Z are each hydrogen or an organic residue or together comprise atoms needed to complete a cyclic nucleus. or IN WHICH A is a cation, X is sulfur or selenium, R1 to R5 are each hydrogen or organic residues provided that at least one of said R1 to R5 is a sulfonic acid group or salt thereof and m and n are each about 0 to about 4 so that the sum of m and n equals a positive integer up to about 8; Photographic silver halide emulsions and elements comprising said emulsions are stabilized against fog by organic selenium derivatives and their sulfur-containing analogs. New alkyl selenols useful in fog stabilizing concentrations are likewise disclosed. These fog stabilizing organic compounds have the structural formula:
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:45
CPC Classifications
C; C07; C07D; C07D277/00; C07D277/60; C07D277/62; C07D277/68; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34; G03C1/346; G03C1/492; G03C5/00; G03C5/26; G03C5/38; G03C8/00; G03C8/32; G03C8/36; G03C8/365
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
39 words
A PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT BEARING A LIGHT SENSITIVE SILVER HALIDE-CONTAINING LAYER AND, IN A CONCENTRATION OF FROM ABOUT 0.005 GRAM TO ABOUT 50 GRAMS PER MOLE OF SILVER, AN ORGANIC COMPOUND HAVING THE STRUCTURAL FORMULA: (I) A-X-(C(-R1)(-R2))M-(C(-R3)(-R4))N-R5
Claim 2
Dependent Claim
39 words
A PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT BEARING A LIGHT SENSITIVE SILVER HALIDE-CONTAINING LAYER AND, IN A CONCENTRATION OF FROM ABOUT 0.005 GRAM TO ABOUT 50 GRAMS PER MOLE OF SILVER, AN ORGANIC COMPOUND HAVING THE STRUCTURAL FORMULA: (I) A-X-(C(-R1)(-R2))M-(C(-R3)(-R4))N-R5
Claim 3
Dependent Claim
36 words
A photographic element comprising a support bearing a light sensitive silver halide-containing layer and, in a concentration of from about 0.005 to about 1.0 gram per mole of silver, an organic compound having the structural formula:
Claim 4
Dependent Claim
36 words
A photographic element comprising a support bearing a light sensitive silver halide-containing layer and, in a concentration of from about 0.005 to about 1.0 gram per mole of silver, an organic compound having the structural formula:
Claim 5
Dependent Claim
45 words
The photographic element of claim 2 wherein at least one light sensitive silver halide-containing layer further comprises a phenolic, pyrazolone or open-chain reactive methylene coupler compound capable of forming a dye with an oxidation product of an aromatic primary amine silver halide color developing agent.
Claim 6
Dependent Claim
20 words
The photographic element of claim 2 whererin at least one light sensitive silver halide-containing layer further comprises a development modifier.
Claim 7
Dependent Claim
16 words
The element of claim 2 in which said compound is present in the silver halide-containing layer.
Claim 8
Dependent Claim
18 words
The element of claim 2 comprising the compound of Forumla I corresponding to guanidinium-2-mercaptoethane sulfonate or guanidinium-2-selenylpropane sulfonate.
Claim 9
Dependent Claim
21 words
The element of claim 2 comprising the compound of Formula II corresponding to o-(N-ethylacetamido)-selenaphenol, 2(N-ethylacetamido)propene - 1 - thiol or 2(N-methylpropionamido)propene-1-selenol.
Claim 10
Dependent Claim
37 words
A photographic element comprising a support bearing a light sensitive silver halide-containing layer and, in a concentration of from about 1.0 gram to about 50 grams per mole of silver, an organic compound having the structural formula:
Claim 11
Dependent Claim
37 words
A photographic element comprising a support bearing a light sensitive silver halide-containing layer and, in a concentration of from about 1.0 gram to about 50 grams per mole of silver, an organic compound having the structural formula:
Claim 12
Dependent Claim
21 words
The element of claim 8 in which said silver halide containing layer is an emulsion layer comprising gelatin as a binder.
Claim 13
Dependent Claim
37 words
A photographic element comprising a support bearing a light sensitive silver halide-containing layer and, in a concentration of from about 0.005 gram to about 50 grams per mole of silver, an organic compound having the structural formula:
Claim 14
Dependent Claim
37 words
A photographic element comprising a support bearing a light sensitive silver halide-containing layer and, in a concentration of from about 0.005 gram to about 50 grams per mole of silver, an organic compound having the structural formula:
Claim 15
Dependent Claim
37 words
A photographic element comprising a support bearing a light sensitive silver halide-containing layer and, in a concentration of from about 0.005 gram to about 50 grams per mole of silver, an organic compound having the structural formula:
Claim 16
Dependent Claim
37 words
A photographic element comprising a support bearing a light sensitive silver halide-containing layer and, in a concentration of from about 0.005 gram to about 50 grams per mole of silver, an organic compound having the structural formula:
Claim 17
Dependent Claim
37 words
A photographic element comprising a support bearing a light sensitive silver halide-containing layer and, in a concentration of from about 0.005 gram to about 50 grams per mole of silver, an organic compound having the structural formula:
Claim 18
Dependent Claim
37 words
A photographic element comprising a support bearing a light sensitive silver halide-containing layer and, in a concentration of from about 0.005 gram to about 50 grams per mole of silver, an organic compound having the structural formula:
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) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |