US2439210A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic silver-halide emulsions containing 1,3,4-triazaindolizine cyanine dyes
Assignee: GAF Chemicals Corp
•
Filing: 1946-06-07
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Granted: 1948-04-06
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Expires: 1966-06-07
Abstract
No abstract record available.
Inventors
- 👤 Heimbach Newton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:14
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/10; G03C1/12; G03C1/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2153928A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-06 | 1951-10-06 | 1952-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-06 | 1955-10-06 | 1956-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-06 | 1959-10-06 | 1960-04-06 | $7700.00 | Window Closed / Lapsed |