Patent US3463640A successfully refreshed from Google Patents.
US3463640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Supersensitised silver halide emulsions with three cyanine dyes
Assignee: Ilford Imaging UK Ltd
•
Filing: 1965-12-10
•
Granted: 1969-08-26
•
Expires: 1985-12-10
Abstract
No abstract record available.
Inventors
- 👤 Geoffrey Ernest Ficken
- 👤 Douglas James Fry
- 👤 Elvin Frederick Willi Thurston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:51
CPC Classifications
C; C22; C22C; C22C37/00; C22C37/06; C09; C09B; C09B23/00; C09B23/02; C09B23/06; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/10; G03C1/12; G03C1/14; G03C1/18; G03C1/28; G03C1/29
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1972-08-25 | 1973-02-24 | 1973-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-25 | 1977-02-24 | 1977-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-25 | 1981-02-24 | 1981-08-26 | $7700.00 | Window Closed / Lapsed |