Patent US3764339A successfully refreshed from Google Patents.
US3764339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide emulsions stabilized with n-(1,3,4-thiadiazol-2-yl)-dithiocarbamic acid esters
Assignee: Agfa Gevaert AG
•
Filing: 1971-09-08
•
Granted: 1973-10-09
•
Expires: 1991-09-08
Abstract
Abstract THE STABILITY OF PHOTOGRAPHIC SILVER HALIDE EMULSIONS AGAINST SPONTANEOUS FOG FORMATION IS IMPROVED BY ADDITION OF AN N-(1,3,4-THIADIAZOL-2-YL)-DITHIOCARBAMIC ACID ESTER.
Inventors
- 👤 W Himmelmann
- 👤 Koenig A Von
- 👤 W Saleck
- 👤 F Moll
- 👤 D Ruecker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:15
CPC Classifications
C; C07; C07D; C07D285/00; C07D285/01; C07D285/02; C07D285/04; C07D285/12; C07D285/125; C07D285/135; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34; G03C1/346
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |