Patent US1843092A successfully refreshed from Google Patents.
Patent US3881939A successfully refreshed from Google Patents.
US3881939A
Expired / Lapsed
US
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Photographic silver halide emulsions containing sydnones or sydnone imines as stabilizers
Assignee: Mitsubishi Paper Mills Ltd
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Filing: 1973-05-17
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Granted: 1975-05-06
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Expires: 1993-05-17
Abstract
Abstract The photographic silver halide emulsion contains as a latentimage stabilizer the compound represented by the general formula WHEREIN R1 represents a hydrogen atom, an allyl group, a heterocyclic ring, an unsubstituted or substituted lower alkyl group, an unsubstituted or substituted aryl group, or an unsubstituted or substituted lower aralkyl group; R2 represents a hydrogen atom, a halogen atom, an acetyl group, a carboxyl group, a formyl group, a nitro group, an amino group, or an unsubstituted or substituted carbamoyl group; X represents an oxygen atom or an unsubstituted or substituted imino group; and + OR - represents a resonance structure.
Inventors
- 👤 Touru Noda
- 👤 Norio Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:16
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
31 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION CONTAINING IN AN AMOUNT OF 0.1 TO 2 G. PER MOL OF THE SILVER HALIDE IN THE EMULSSION AT LEAST ONE COMPOUND REPRESENTED BY THE FORMULA
Claim 2
Dependent Claim
31 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION CONTAINING IN AN AMOUNT OF 0.1 TO 2 G. PER MOL OF THE SILVER HALIDE IN THE EMULSSION AT LEAST ONE COMPOUND REPRESENTED BY THE FORMULA
Claim 3
Dependent Claim
39 words
A photographic silver halide element comprising a support bearing thereon a silver halide emulsion layer containing in an amount of 0.1 to 2 g. per mol of the silver halide in the emulsion the compound represented by the formula
Claim 4
Dependent Claim
39 words
A photographic silver halide element comprising a support bearing thereon a silver halide emulsion layer containing in an amount of 0.1 to 2 g. per mol of the silver halide in the emulsion the compound represented by the formula
References Cited (Backward Citations)
US3422759A
Cited
US3589898A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |