US2534599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized gelatino silver halide photographic emulsion
Assignee: Elliott and Sons Ltd
•
Filing: 1947-07-15
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Granted: 1950-12-19
•
Expires: 1967-07-15
Abstract
No abstract record available.
Inventors
- 👤 Howe Dennis John Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:54
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34; G03C1/346
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
39 words
A PHTOGRAPHIC MATERIAL WHICH INCLUDES A GELATINO SILVER HALIDE EMULSION LAYER IN WHICH IS INCORPORATED A COMPOUND SELECTED FROM THE GROUP CONSISTING OF SUBSTITUTED DITHIOURAZOLES AND THE METAL SALTS OF SUBSTITUTED DITHIOURAZOLES WHEREIN TEH SUBSTITUTED DITHIOURAZOLE HAS THE 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) | 1953-12-18 | 1954-06-19 | 1954-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-18 | 1958-06-19 | 1958-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-18 | 1962-06-19 | 1962-12-19 | $7700.00 | Window Closed / Lapsed |