US3607289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gelatin emulsions having improved properties
Assignee: Agfa Gevaert AG
•
Filing: 1967-08-23
•
Granted: 1971-09-21
•
Expires: 1987-08-23
Abstract
Abstract Photosensitive photographic material having at least one gelatin-containing emulsion comprising an anionic polyurethane in which the salt-forming groups are phosponic acid, phosphoric ester or phosphoric acid amide groups, or their salts.
Inventors
- 👤 Wolfgang Keberle
- 👤 Wolfgang Himmelmann
- 👤 Fritz Nittel
- 👤 Gunter Oertel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:24
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0804; C08G18/0819; C08G18/28; C08G18/30; C08G18/38; C08G18/3878
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
21 words
Photographic material according to claim 1, wherein said compound having molecular weight of 300-10,000 is a polyester which contains hydroxyl groups.
References Cited (Backward Citations)
US3258338A
Cited
US3397989A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |