Patent US3260598A successfully refreshed from Google Patents.
US3260598A
Expired / Lapsed
US
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Photographic element-developer system
Assignee: Eastman Kodak Co
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Filing: 1961-05-29
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Granted: 1966-07-12
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Expires: 1981-05-29
Abstract
No abstract record available.
Inventors
- 👤 Henry C Yutzy
- 👤 Charles A Goffe
- 👤 Edwin B Wyand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:17
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/02; G03C8/04; G03C8/06; G03C1/00; G03C1/005; G03C1/06; G03C1/42; G03C5/00; G03C5/26; G03C5/261; G03C5/29; G03C5/315; G03C8/32; G03C8/36; G03C8/365
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
IN A SOLVENT TRANSFER PROCESS FOR FORMING A SILVER NEGATIVE IMAGE IN A LATENT IMAGE BEARING LIGHT-SENSITIVE SILVER HALIDE EMULSION LAYER, AND FOR SIMULTANEOUSLY FORMING SILVER POSITIVE IMAGE IN A PROCESSING ELEMENT CONTAINING A HYDROPHILIC COLLOID LAYER THAT INCORPORATES A SILVER HALIDE SOLVENT AND A SILVER NUCLEATING AGENT, THE IMPROVEMENT COMPRISING (1) THE INCORPORATION OF A SILVER HALIDE DEVELOPING AGENT IN AT LEAST ONE OF SAID LAYERS, (2) THE INCORPORATION OF A COMPOUND HAVING THE FORMULA Z(OH)N WHEREIN Z REPRESENTS A METAL SELECTED FROM THE CLASS CONSISTING OF CADMIUM, ALUMINUM, ZINC, TITANIUM AND LEAD, AND N REPRESENTS AN INTEGER OF FROM 2 TO 4 WHICH HAS THE SAME NUMERICAL VALUE AS THE VALENCE OF THE METAL Z IN ONE OF SAID LAYERS AND (3) THE INCORPORATION OF A COMPOUND HAVING THE FORMULA XY, WHEREIN
Claim 2
Dependent Claim
134 words
IN A SOLVENT TRANSFER PROCESS FOR FORMING A SILVER NEGATIVE IMAGE IN A LATENT IMAGE BEARING LIGHT-SENSITIVE SILVER HALIDE EMULSION LAYER, AND FOR SIMULTANEOUSLY FORMING SILVER POSITIVE IMAGE IN A PROCESSING ELEMENT CONTAINING A HYDROPHILIC COLLOID LAYER THAT INCORPORATES A SILVER HALIDE SOLVENT AND A SILVER NUCLEATING AGENT, THE IMPROVEMENT COMPRISING (1) THE INCORPORATION OF A SILVER HALIDE DEVELOPING AGENT IN AT LEAST ONE OF SAID LAYERS, (2) THE INCORPORATION OF A COMPOUND HAVING THE FORMULA Z(OH)N WHEREIN Z REPRESENTS A METAL SELECTED FROM THE CLASS CONSISTING OF CADMIUM, ALUMINUM, ZINC, TITANIUM AND LEAD, AND N REPRESENTS AN INTEGER OF FROM 2 TO 4 WHICH HAS THE SAME NUMERICAL VALUE AS THE VALENCE OF THE METAL Z IN ONE OF SAID LAYERS AND (3) THE INCORPORATION OF A COMPOUND HAVING THE FORMULA XY, WHEREIN
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-11 | 1970-01-10 | 1970-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-11 | 1974-01-10 | 1974-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-11 | 1978-01-10 | 1978-07-12 | $7700.00 | Window Closed / Lapsed |