US2495918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Poly-n-vinyl lactam photographic silver halide emulsions
Assignee: EIDP Inc
•
Filing: 1948-08-28
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Granted: 1950-01-31
•
Expires: 1968-08-28
Abstract
No abstract record available.
Inventors
- 👤 Bolton Elmer Keiser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:05
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/053
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
A PHOTOGRAPHIC EMULSION COMPRISES LIGHTSENSITIVE SILVER HALIDE GRAINS DISPERSED IN A POLYN-VINYL LACTAM HAVING A MOLECULAR WEIGHT OF ABOUT 10,000 TO 500,000.
Claim 2
Dependent Claim
22 words
A PHOTOGRAPHIC EMULSION COMPRISES LIGHTSENSITIVE SILVER HALIDE GRAINS DISPERSED IN A POLYN-VINYL LACTAM HAVING A MOLECULAR WEIGHT OF ABOUT 10,000 TO 500,000.
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) | 1953-01-30 | 1953-08-01 | 1954-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-30 | 1957-08-01 | 1958-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-30 | 1961-08-01 | 1962-01-31 | $7700.00 | Window Closed / Lapsed |