Patent US2845349A successfully refreshed from Google Patents.
US2845349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic developers
Assignee: Konica Minolta Graphic Imaging USA Inc
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Filing: 1955-09-07
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Granted: 1958-07-29
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Expires: 1975-09-07
Abstract
No abstract record available.
Inventors
- 👤 Schwarz George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:38
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/305
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
A PHOTOGRAPHIC DEVELOPER COMPRISING AN ORGANIC SILVER-HALIDE DEVELOPING AGENT, AN ALKALI SULFITE AND AN AMOUNT SUFFICIENT TO FORM FROM 1 TO 35 GRAMS PER LITER WHEN DISSOLVED IN WATER OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF KOJIC ACID AND ITS WATER SOLUBLE SALTS.
Claim 2
Dependent Claim
45 words
A PHOTOGRAPHIC DEVELOPER COMPRISING AN ORGANIC SILVER-HALIDE DEVELOPING AGENT, AN ALKALI SULFITE AND AN AMOUNT SUFFICIENT TO FORM FROM 1 TO 35 GRAMS PER LITER WHEN DISSOLVED IN WATER OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF KOJIC ACID AND ITS WATER SOLUBLE SALTS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-28 | 1962-01-27 | 1962-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-28 | 1966-01-27 | 1966-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-28 | 1970-01-27 | 1970-07-29 | $7700.00 | Window Closed / Lapsed |