Patent US3909268A successfully refreshed from Google Patents.
US3909268A
Expired / Lapsed
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Tetrazolium C-oxy-betaine compounds as antifog agents for silver halide photographic emulsions
Assignee: 3M Co
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Filing: 1974-04-29
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Granted: 1975-09-30
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Expires: 1994-04-29
Abstract
Abstract Tetrazolium C-oxy-betaine compounds are effective antifog agents for silver halide photographic emulsions when reactively associated therewith. Such compounds can be incorporated in the photographic element in reactive association with the silver halide emulsion or in a processing bath prior to or during development of emulsion layers.
Inventors
- 👤 Agostino Baldassarri
- 👤 Walter Ferro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:28
CPC Classifications
C; C07; C07D; C07D257/00; C07D257/02; C07D257/04; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
19 words
A SILVER PHOTOGRAPHIC EMULSION HAVING IN REACTIVE CONTACT THEREWITH AT LEAST A FOG-INHIBITING AMOUNT OF A TETRAZOLIUM C-OXY-BETAINE COMPOUND.
Claim 2
Dependent Claim
19 words
A SILVER PHOTOGRAPHIC EMULSION HAVING IN REACTIVE CONTACT THEREWITH AT LEAST A FOG-INHIBITING AMOUNT OF A TETRAZOLIUM C-OXY-BETAINE COMPOUND.
Claim 3
Dependent Claim
24 words
A silver halide photographic emulsion having in reactive contact therewith at least a fog-inhibiting amount of a tetrazolium C-oxy-betaine compound corresponding to the formula
Claim 4
Dependent Claim
24 words
A silver halide photographic emulsion having in reactive contact therewith at least a fog-inhibiting amount of a tetrazolium C-oxy-betaine compound corresponding to the formula
Claim 5
Dependent Claim
13 words
The emulsion of claim 1 wherein said antifogging compound is 2 ,3-di-phenyl-5-oxy-tetrazolium betaine.
Claim 6
Dependent Claim
12 words
The emulsion of claim 1 wherein said antifogging compound is 2,3-di-(4-chloro-phenyl)-5-oxy-tetrazolium betaine.
Claim 7
Dependent Claim
12 words
The emulsion of claim 1 wherein said antifogging compound is 2,3-di-(3-trifluoromethyl-phenyl-5-oxy-tetrazolium betaine.
Claim 8
Dependent Claim
12 words
The emulsion of claim 1 wherein said antifogging compound is 2,3-di-(3-chloro-4-methyl-phenyl-5-oxy-tetrazolium betaine.
Claim 9
Dependent Claim
12 words
The emulsion of claim 1 wherein said antifogging compound is 2,3-di-(2-ethyl-phenyl-5-oxy-tetrazolium betaine.
Claim 10
Dependent Claim
13 words
The emulsion of claim 1 wherein said antifogging compound is 2,3-di-(4-methyl-phenyl-5-oxy tetrazolium betaine.
Claim 11
Dependent Claim
12 words
The emulsion of claim 1 wherein said antifogging compound is 2,3-di-(3,4-di-methyl-phenyl-5-oxy-tetrazolium betaine.
Claim 12
Dependent Claim
12 words
The emulsion of claim 1 wherein said antifogging compound is 2,3-di-(2-acetyl-5-chloro-phenyl-5-oxy-tetrazolium betaine.
Claim 13
Dependent Claim
12 words
The emulsion of claim 1 wherein said antifogging compound is 2,3-di-(2-chloro-phenyl-5-oxy-tetrazolium betaine.
Claim 14
Dependent Claim
12 words
The emulsion of claim 1 wherein said antifogging compound is 2,3-di-(3,4-di-chloro-phenyl-5-oxy-tetrazolium betaine.
Claim 15
Dependent Claim
12 words
The emulsion of claim 1 wherein said antifogging compound is 2,3-di-(3-methoxy-phenyl-5-oxy-tetrazolium betaine.
Claim 16
Dependent Claim
24 words
A silver halide photographic element having a silver halide emulsion layer and a fog-inhibiting amount of a tetrazolium C-oxy-betaine compound in reactive association therewith.
Claim 17
Dependent Claim
24 words
A silver halide photographic element having a silver halide emulsion layer and a fog-inhibiting amount of a tetrazolium C-oxy-betaine compound in reactive association therewith.
Claim 18
Dependent Claim
34 words
A silver halide photographic element having a silver halide emulsion layer and a fog-inhibiting amount of a tetrazolium C-oxy-betaine of formulas respectively corresponding to those referred to in claims 2 in reactive association therewith.
Claim 19
Dependent Claim
17 words
The photographic element of claim 14 wherein said tetrazolium C-oxy-betaine compound is contained in said emulsion layer.
Claim 20
Dependent Claim
22 words
The photographic element of claims 14 wherein said tetrazolium C-oxy-betaine compound is incorporated in a layer adjacent said silver halide emulsion layer.
References Cited (Backward Citations)
US3023103A
Cited
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 |