Photographic articles and materials useful in their manufacture
Abstract
Abstract THIS DEVELOPMENT RELATES TO FILM MATERIALS THAT ARE ESPECIALLY ADAPTED FOR USE AS PHOTOGRAPHIC FILM UNITS IN FILM PACKS WHICH, IN TURN, ARE PREFERABLY ADAPTED FOR DEVELOPMENT OUTSIDE THE CAMERA. THE PHOTOGRAPHIC FILMS FOR THIS INVENTION ARE COMPRISED OF A BLACK FILM BASE HAVING ON ONE SURFACE THEREOF A LAYER CONTAINING SPHERICAL POLYMERIC BEADS, CARBON BLACK AND LOW VISCOSITY CELLULOSE NITRATE (TO PROVIDE IMPROVED ADHESION TO THE FILM BASE). OPTIONALLY, ON THE OTHER SURFACE IS A WHITE LAYER CONTAINING TITANIUM DIOXIDE PIGMENT AND LOW VISCOSITY CELLULOSE NITRATE, A GEL SUB LAYER, AND FINALLY A PHOTOGRAPHIC EMULSION. THIS APPLICATION IS DIRECTED TO THE COATING COMPOSITIONS WHICH ARE PARTICULARLY USEFUL IN THE COATING OF THE BLACK FILM BASE.
Inventors
- 👤 Howard F Earhart
- 👤 Frederick J Jacoby
- 👤 Clemens B Starck
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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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) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |