US3420667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substituted quinones and dimine quinones as silver halide sensitizers
Assignee: RALPH A COPELAND
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Filing: 1965-12-29
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Granted: 1969-01-07
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Expires: 1985-12-29
Abstract
No abstract record available.
Inventors
- 👤 Ralph A Copeland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:49
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A PHOTOGRAPHIC FILM COMPRISING A BASE AND A LIGHT SENSITIVE SILVER HALIDE EMULSION OF TH TYPE SUITABLE FOR HALFTONE REPRODUCTION, SAID SILVER HALIDE BEING SELECTED FROM THE GROUP CONSISTING OF SILVER CHLORIDE, SILVER CHLOROBROMIDE, SILVER CHLOROBROMOIODIDE, SAID EMULSION CONTAINING FROM 0.01 TO 0.1 GRAM PER 100 GRAMS OF SILVER HALIDE PRESENT IN THE PREPARATION OF THE EMULSION OF A COMPOUND CORRESPONDING TO THE FORMULA:
Claim 2
Dependent Claim
64 words
A PHOTOGRAPHIC FILM COMPRISING A BASE AND A LIGHT SENSITIVE SILVER HALIDE EMULSION OF TH TYPE SUITABLE FOR HALFTONE REPRODUCTION, SAID SILVER HALIDE BEING SELECTED FROM THE GROUP CONSISTING OF SILVER CHLORIDE, SILVER CHLOROBROMIDE, SILVER CHLOROBROMOIODIDE, SAID EMULSION CONTAINING FROM 0.01 TO 0.1 GRAM PER 100 GRAMS OF SILVER HALIDE PRESENT IN THE PREPARATION OF THE EMULSION OF A COMPOUND CORRESPONDING TO THE FORMULA:
References Cited (Backward Citations)
BE645794A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |