US3043694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel class of 3-indazolinone developing agent
Assignee: Eastman Kodak Co
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Filing: 1960-05-23
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Granted: 1962-07-10
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Expires: 1980-05-23
Abstract
No abstract record available.
Inventors
- 👤 Charles R Barr
- 👤 Richard W Henn
- 👤 Hmari F Salminen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:03
CPC Classifications
C; C07; C07D; C07D231/00; C07D231/54; C07D231/56; C07D401/00; C07D401/02; C07D401/04; G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/30; G03C5/3028; G03C5/3035
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
29 words
AN ALKALINE PHOTOGRAPHIC DEVELOPER SOLUTION CONTAINING FROM 0.1 TO 10 GRAMS PER LITER OF AN ALKALI SULFITE AND AS THE SOLE PHOTOGRAPHIC DEVELOPING AGENT A COMPOUND HAVING THE FORMULA:
Claim 2
Dependent Claim
38 words
A PROCESS FOR PRODUCING A DYE IMAGE IN AN EXPOSED LIGHT-SENSITIVE PHOTOGRAPHIC EMULSION COMPRISING THE STEPS; DEVELOPMENT WITH A DEVELOPER SOLUTION OF CLAIM 8, BLEACHING WITH AN ALKALI FERICYANIDE BLEACH SOLUTION AND FIXING WITH AN ALKALI THIOSULFATE COMPOSITION.
References Cited (Backward Citations)
US2673801A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-09 | 1966-01-08 | 1966-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-09 | 1970-01-08 | 1970-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-09 | 1974-01-08 | 1974-07-10 | $7700.00 | Window Closed / Lapsed |