US2972534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Subbing of polystyrene
Assignee: —
•
Filing: 1957-04-23
•
Granted: 1961-02-21
•
Expires: 1977-04-23
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:43
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/91; G03C1/93
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
63 words
A PHOTOGRAPHIC FILM COMPRISING A TRANSPARENT POLYSTYRENE BASE, PROVIDED ON BOTH SIDES IN THE FOLLOWING ORDER WITH AN ANCHORING LAYER COMPRISING A BINARY COPOLYMER OF ETHYL METHACRYLATE AND METHYL ACRYLATE AND WITH A SUBBING LAYER COMPRISING A CELLULOSE ESTER AND GELATIN, ONE OF SAID SUBBING LAYERS CARRYING A GELATINOUS ANTIHALATION LAYER AND THE OTHER SUBBING LAYER CARRYING A GELATINOUS LIGHT-SENSITIVE SILVER-HALIDE EMULSION LAYER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-21 | 1964-08-22 | 1965-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-21 | 1968-08-22 | 1969-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-21 | 1972-08-22 | 1973-02-21 | $7700.00 | Window Closed / Lapsed |