Patent US4028891A successfully refreshed from Google Patents.
US3690918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic element and process
Assignee: Eastman Kodak Co
•
Filing: 1970-03-19
•
Granted: 1972-09-12
•
Expires: 1990-03-19
Abstract
Abstract PHOTOGRAPHIC ELEMENTS INCORPORATING AN ELECTRICALLY INSULATING SUPPORT HAVING COATED THEREON AT LEAST ONE RADIATION-SENSITIVE SILVER SALT LAYER CAN BE PREPARED WITH LITTLE OR NO HYDROPHILIC COLLOID BINDER BY THE ELECTOSTATIC DEPOSITION OF DISPERSED PREFORMED, RADIATION-SENSITIVE SILVER SALT CRYSTALS FROM A FLUID MEDIUM, WHICH ELECTROSTATIC COATING PROCESS CAN ALSO BE USED TO DEPOSIT SUCH SILVER SALT CRYSTALS INCLUDING SILVER-DYE COMPLEX CRYSTALS WHICH HAVE BEEN PREVIOUSLY DISPERSED IN A HYDROPHILLIC COLLOID BINDER.
Inventors
- 👤 Warren J Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:38
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/494; G03C1/496; Y; Y10; Y10S; Y10S430/00; Y10S430/136
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |