US3103437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hardening
Assignee: —
•
Filing: —
•
Granted: 1963-09-10
•
Expires: 1980-09-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:04
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/30
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
64 words
A METHOD OF HARDENING A GELATION-SILVER HALIDE PHOTOGRAPHIC EMULSION LAYER UPON A SUPPORT THEREFOR WHICH COMPRISING TREATING THE LAYER WITH AN AQUEOUS SOLUTION OF A BISULFITE ADDUCT OF AN ORGANIC DIISOCYANATE WHOSE ISOCYANATE GROUPS ARE SEPARATED BY A HYDROCARBON CHAIN OF AT LEAST TWO CARBON ATOMS, AND SUBSEQUENTLY TREATING THE LAYER WITH AN AQUEOUS ALKALINE BATH CONTAINING AN ALKALI METAL SULFATE IN SOLUTION THEREIN.
References Cited (Backward Citations)
US1941852A
Cited
US2284896A
Cited
US2381063A
Cited
US2403327A
Cited
US2592263A
Cited
US2614930A
Cited
US2710816A
Cited
US2708642A
Cited
US2897094A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-09-09 | 1967-03-11 | 1967-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-09 | 1971-03-11 | 1971-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-09 | 1975-03-11 | 1975-09-10 | $7700.00 | Window Closed / Lapsed |