Photographic overcoat compositions and photographic elements
Abstract
Abstract PHOTOGRAPHIC ELEMENTS SUCH AS, FOR EXAMPLE, X-RAY FILM, COMPRISING A SUPPORT, ONE OR MORE PHOTOGRAPHIC SILVER HALIDE LAYERS, AND ONE OR MORE PROTECTIVE OVERCOAT LAYERS AND A COMPOSITION OF MATTER WHICH HAS UTILITY IN SUCH OVERCOAT LAYERS ARE DISCLOSED. THE PHOTOGRAPHIC ELEMENTS ARE CHARACTERIZED BY HAVING A GOOD COMBINATION OF PHOTOGRAPHIC PROPERTIES SUCH AS, FOR EXAMPLE, SENSITIVITY AND CONTRAST, RESISTANCE TO ABRASION AND LOW HAZE; AND ARE MORE PARTICULARLY CHARACTERIZED IN THE USE OF AT LEAST ONE OVERCOAT LAYER HAVING THE DISCLOSED COMPOSITION COMPRISING GELATIN, AND AT LEAST ONE OTHER HYDROPHILIC COLLOID AND FINELY DIVIDED COLLOIDAL SILICA OR SILICA GEL HAVING AN AVERAGE PARTICLE SIZE BELOW 50 MILLIMICRONS.
Inventors
- 👤 James Plakunov
Bibliographic Details
Claims Analysis
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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) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |