US3071465A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fog reduction in silver halide emulsions by 2h-tetrazolium halides
Assignee: GAF Chemicals Corp
•
Filing: 1961-03-14
•
Granted: 1963-01-01
•
Expires: 1981-03-14
Abstract
No abstract record available.
Inventors
- 👤 Dersch Fritz
- 👤 Angelus Millet R De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:45
CPC Classifications
C; C07; C07D; C07D257/00; C07D257/02; C07D257/04; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
THE PROCESS OF MINIMIZING AND PREVENTING FOG IN A LIGHT-SENSITIVE SILVER HALIDE MATERIAL, COMPRISING A BASE HAVING A LIGHT-SENSITIVE EMULSION THEREON WHICH COMPRISES EXPOSING SAID EMULSION TO LIGHT AND DEVELOPING THE SAME IN THE PRESENCE OF AN ANTIFOGGANT OF THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
42 words
THE PROCESS OF MINIMIZING AND PREVENTING FOG IN A LIGHT-SENSITIVE SILVER HALIDE MATERIAL, COMPRISING A BASE HAVING A LIGHT-SENSITIVE EMULSION THEREON WHICH COMPRISES EXPOSING SAID EMULSION TO LIGHT AND DEVELOPING THE SAME IN THE PRESENCE OF AN ANTIFOGGANT OF THE FOLLOWING FORMULA:
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) | 1965-12-31 | 1966-07-02 | 1967-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-31 | 1970-07-02 | 1971-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-31 | 1974-07-02 | 1975-01-01 | $7700.00 | Window Closed / Lapsed |