Patent US3199983A successfully refreshed from Google Patents.
US3199983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
3-indazolone color couplers
Assignee: Agfa Gevaert NV
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Filing: 1962-01-22
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Granted: 1965-08-10
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Expires: 1982-01-22
Abstract
No abstract record available.
Inventors
- 👤 Koepke Gunther
- 👤 Pelz Willibald
- 👤 Schellenberger Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:03
CPC Classifications
C; C07; C07D; C07D231/00; C07D231/54; C07D231/56; G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/3231
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
14 words
A LIGHT-SENSITIVE SILVER HALIDE EMULSION CONTAINING A COLOR COUPLER OF THE FOLLOWING GENERAL FORMULA
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) | 1968-08-09 | 1969-02-08 | 1969-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-09 | 1973-02-08 | 1973-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-09 | 1977-02-08 | 1977-08-10 | $7700.00 | Window Closed / Lapsed |