US2126899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Development process and developer for producing hardened images upon exposed silver halide-colloid emulsions
Assignee: NAAMLOOZE VENNOOTSCHAP NEDERLANDSCH LABORATORIUM DE SPAARNESTAD
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Filing: 1935-07-10
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Granted: 1938-08-16
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Expires: 1955-07-10
Abstract
No abstract record available.
Inventors
- 👤 Leiber Ferdinand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:46
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/30; G03C5/315
Claims Analysis
Total Claims: 0
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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) | 1941-08-15 | 1942-02-14 | 1942-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-08-15 | 1946-02-14 | 1946-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-08-15 | 1950-02-14 | 1950-08-16 | $7700.00 | Window Closed / Lapsed |