US3010827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic developer
Assignee: Agfa Gevaert NV
•
Filing: 1957-12-11
•
Granted: 1961-11-28
•
Expires: 1977-12-11
Abstract
No abstract record available.
Inventors
- 👤 Pelz Willibald
- 👤 Burgardt Lothar
- 👤 Wahl Ottmar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:20
CPC Classifications
C; C07; C07D; C07D231/00; C07D231/02; C07D231/06; C07D231/10; C07D231/14; C07D231/44; C07D231/46; G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/30; G03C5/3028; G03C5/3035; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0622; G03G5/0624; G03G5/0627; G03G5/0631
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
AN AQUEOUS DEVELOPING SOLUTION FOR SILVER HALIDE EMULSION LAYERS COMPRISING AS SILVER HALIDE DEVELOPER A 4-AMINO-5-PYRAZOLONE OF THE GENERAL FORMULA: A-AMINO-5-PYRAZOLONE OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
25 words
AN AQUEOUS DEVELOPING SOLUTION FOR SILVER HALIDE EMULSION LAYERS COMPRISING AS SILVER HALIDE DEVELOPER A 4-AMINO-5-PYRAZOLONE OF THE GENERAL FORMULA: A-AMINO-5-PYRAZOLONE OF THE GENERAL FORMULA:
References Cited (Backward Citations)
US853643A
Cited
FR1124976A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-27 | 1965-05-29 | 1965-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-27 | 1969-05-29 | 1969-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-27 | 1973-05-29 | 1973-11-28 | $7700.00 | Window Closed / Lapsed |