Patent US3758461A successfully refreshed from Google Patents.
US3758461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyes and photographic materials
Assignee: Eastman Kodak Co
•
Filing: 1971-07-09
•
Granted: 1973-09-11
•
Expires: 1991-07-09
Abstract
Abstract NOVEL TRICARBOCYANINE DYES ARE PROVIDED HAVING A 1PIPERAZINYL GROUP ATTACHED TO THE MESO CARBON ATOM OF THE METHINE LINKAGE OF THE DYE. LIGHT SENSITIVE SILVER HALIDE GRAINS ARE SPECTRALLY SENSITIZED WITH THE TRICARBOCYANINE DYES OF THIS INVENTION.
Inventors
- 👤 A Fumia
- 👤 L Brooker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:48
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/10; G03C1/12
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |