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Patent US2981623A successfully refreshed from Google Patents.
US2981623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic developers
Assignee: Agfa Gevaert NV
•
Filing: 1955-03-14
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Granted: 1961-04-25
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Expires: 1975-03-14
Abstract
No abstract record available.
Inventors
- 👤 Burgardt Lothar
- 👤 Pelz Willibald
- 👤 Wahl Ottmar
- 👤 Sassmann Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:50
CPC Classifications
C; C07; C07D; C07D231/00; C07D231/02; C07D231/10; C07D231/14; C07D231/18; C07D231/20; C07D231/22; C07D231/24; C07D231/44; C07D231/46; C07D231/48; C07D231/50; C07D231/54; C07D231/56; G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/30; G03C5/3028; G03C5/3035
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
THE PROCESS OF DEVELOPING SILVER HALIDE LAYERS WHICH COMPRISES APPLYING TO SAID LAYERS A COMPOUND HAVING A FORMULA SELECTED FROM THE GROUP CONSISTING OF
Claim 2
Dependent Claim
24 words
THE PROCESS OF DEVELOPING SILVER HALIDE LAYERS WHICH COMPRISES APPLYING TO SAID LAYERS A COMPOUND HAVING A FORMULA SELECTED FROM THE GROUP CONSISTING OF
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) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |