US3220849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Formaldehyde and succinaldehyde gelatin hardening composition and method of hardening therewith
Assignee: Eastman Kodak Co
•
Filing: 1963-10-10
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Granted: 1965-11-30
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Expires: 1983-10-10
Abstract
No abstract record available.
Inventors
- 👤 Harry C Baden
- 👤 Bard Charleton Cordery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:36
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/30; G03C1/301
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
29 words
A PREHARDENING COMPOSITION FOR PHOTOGRAPHIC PRODUCTS COMPRISING AN AQUEOUS SOLUTION OF A MIXTURE OF FORMALDEHYDE AND SUCCINALDEHYDE, THE FORMER IN 0.51.5% CONCENTRATION AND THE LATTER IN 0.05-1.0% CONCENTRATION THEREIN.
Claim 2
Dependent Claim
29 words
A PREHARDENING COMPOSITION FOR PHOTOGRAPHIC PRODUCTS COMPRISING AN AQUEOUS SOLUTION OF A MIXTURE OF FORMALDEHYDE AND SUCCINALDEHYDE, THE FORMER IN 0.51.5% CONCENTRATION AND THE LATTER IN 0.05-1.0% CONCENTRATION THEREIN.
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) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |