US2887379A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic elements
Assignee: EIDP Inc
•
Filing: 1955-05-31
•
Granted: 1959-05-19
•
Expires: 1975-05-31
Abstract
No abstract record available.
Inventors
- 👤 Blake Ralph Kingsley
- 👤 Alles Francis Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:12
CPC Classifications
G; G03; G03B; G03B15/00; G03C; G03C1/00; G03C1/76; G03C1/815; G03C5/00; G03C5/16; G03C5/17
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A PHOTOGRAPHIC ELEMENT COMPRISING A SHEET SUPPORT BEARING AT LEAST ONE LAYER OF LIGHT-SENSITIVE SILVER HALIDE DISPERSED IN A WATER-PERMEABLE COLLOID BINDING AGENT AND A COACTIVE FLEXIBLE SCREEN LAYER COMPRISING FINELY DIVIDED PARTICIES OF A PHOSPHOR DISPERSED IN A CHLOROSULFONATED ADDITION POLYMER OF AN OLEFIN CONTAINING 1 TO 2 OLEFINIC DOUBLE BONDS AND NOT MORE THAN 5 CARBON ATOMS.
Claim 2
Dependent Claim
59 words
A PHOTOGRAPHIC ELEMENT COMPRISING A SHEET SUPPORT BEARING AT LEAST ONE LAYER OF LIGHT-SENSITIVE SILVER HALIDE DISPERSED IN A WATER-PERMEABLE COLLOID BINDING AGENT AND A COACTIVE FLEXIBLE SCREEN LAYER COMPRISING FINELY DIVIDED PARTICIES OF A PHOSPHOR DISPERSED IN A CHLOROSULFONATED ADDITION POLYMER OF AN OLEFIN CONTAINING 1 TO 2 OLEFINIC DOUBLE BONDS AND NOT MORE THAN 5 CARBON ATOMS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-18 | 1962-11-17 | 1963-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-18 | 1966-11-17 | 1967-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-18 | 1970-11-17 | 1971-05-19 | $7700.00 | Window Closed / Lapsed |