US3035917A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct positive emulsions
Assignee: Ilford Imaging UK Ltd
•
Filing: 1959-11-04
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Granted: 1962-05-22
•
Expires: 1979-11-04
Abstract
No abstract record available.
Inventors
- 👤 Fry Douglas James
- 👤 Lea Bernard Alan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:29
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/485; G03C1/48515; G03C1/48523; C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06; C07D213/16; C07D213/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
A DIRECT POSITIVE PHOTOGRAPHIC ELEMENT COMPRISING A FOGGED GELATINO SILVER CHLORIDE EMULSION CONTAINING A DESENSITISING COMPOUND OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
20 words
A DIRECT POSITIVE PHOTOGRAPHIC ELEMENT COMPRISING A FOGGED GELATINO SILVER CHLORIDE EMULSION CONTAINING A DESENSITISING COMPOUND OF THE GENERAL FORMULA:
References Cited (Backward Citations)
US1623499A
Cited
US2265907A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-21 | 1965-11-20 | 1966-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-21 | 1969-11-20 | 1970-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-21 | 1973-11-20 | 1974-05-22 | $7700.00 | Window Closed / Lapsed |