US3030209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-contrast photographic silver chloride emulsions and method of processing
Assignee: Eastman Kodak Co
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Filing: 1958-07-02
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Granted: 1962-04-17
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Expires: 1978-07-02
Abstract
No abstract record available.
Inventors
- 👤 Richard W Henn
- 👤 Charles A Goffe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:17
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/305
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
IN THE REPRODUCTION OF A HALF-TONE SCREED PATTERN BY EXPOSING A PHOTOGRAPHIC SILVER HALIDE EMULSION TO A HALF-TONE SCREENED IMAGE AND DEVELOPED THE RESULTING EXPOSED SILVER HALIDE EMULSION WITH A PHOTOGRAPHIC DEVELOPER, THE IMPROVEMENT WHICH COMPRISES EMPLOYING A SILVER HALIDE EMULSION HAVING A SILVER CHLORIDE CONRENT OF AT LEAST 85 MOLE PERCENT AND A PHOTOGRAPHIC DEVELOPER HAVING A PH OF AT LEAST 9.0, AND CONTAINING A 1.4-DIHYDROXYBENZENE COMPOUND, SODIUM FORMALDEHYDE BISULFITE, AND A RESTRAINER, SAID PHOTOGRAPHIC DEVELOPER CONTAINING FROM 0.01 TO 0.05 MOLAR OF SULFITE ION AND SAID SLIVER HALIDE EMULSION HAVING A GAMMA OF AT LEAST 11.
Claim 2
Dependent Claim
98 words
IN THE REPRODUCTION OF A HALF-TONE SCREED PATTERN BY EXPOSING A PHOTOGRAPHIC SILVER HALIDE EMULSION TO A HALF-TONE SCREENED IMAGE AND DEVELOPED THE RESULTING EXPOSED SILVER HALIDE EMULSION WITH A PHOTOGRAPHIC DEVELOPER, THE IMPROVEMENT WHICH COMPRISES EMPLOYING A SILVER HALIDE EMULSION HAVING A SILVER CHLORIDE CONRENT OF AT LEAST 85 MOLE PERCENT AND A PHOTOGRAPHIC DEVELOPER HAVING A PH OF AT LEAST 9.0, AND CONTAINING A 1.4-DIHYDROXYBENZENE COMPOUND, SODIUM FORMALDEHYDE BISULFITE, AND A RESTRAINER, SAID PHOTOGRAPHIC DEVELOPER CONTAINING FROM 0.01 TO 0.05 MOLAR OF SULFITE ION AND SAID SLIVER HALIDE EMULSION HAVING A GAMMA OF AT LEAST 11.
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) | 1965-04-16 | 1965-10-16 | 1966-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-16 | 1969-10-16 | 1970-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-16 | 1973-10-16 | 1974-04-17 | $7700.00 | Window Closed / Lapsed |