US2494055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hardening of photographic sttver
Assignee: —
•
Filing: 1946-12-10
•
Granted: 1950-01-10
•
Expires: 1966-12-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:28
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
29 words
A PHOTO-SENSITIVE ELEMENT CONTAINING A PHOTOGRAPHIC GELATINO SILVER-HALIDE EMULSION LAYER HARDENED BY MEANS OF A PRIMARY ALIPHATIC NITRO ALCOHOL OF 3 TO 6 CARBON ATOMS, 2,4-DIHYDROXY BENZALDEHYDE, AND RESORCINOL.
Claim 2
Dependent Claim
29 words
A PHOTO-SENSITIVE ELEMENT CONTAINING A PHOTOGRAPHIC GELATINO SILVER-HALIDE EMULSION LAYER HARDENED BY MEANS OF A PRIMARY ALIPHATIC NITRO ALCOHOL OF 3 TO 6 CARBON ATOMS, 2,4-DIHYDROXY BENZALDEHYDE, AND RESORCINOL.
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) | 1953-01-09 | 1953-07-11 | 1954-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-09 | 1957-07-11 | 1958-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-09 | 1961-07-11 | 1962-01-10 | $7700.00 | Window Closed / Lapsed |