Patent US5805019A successfully refreshed from Google Patents.
Patent US3706568A successfully refreshed from Google Patents.
US3706568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic diffusion transfer product and process
Assignee: Eastman Kodak Co
•
Filing: 1971-04-06
•
Granted: 1972-12-19
•
Expires: 1991-04-06
Abstract
Abstract A RECEIVING SHEET FOR USE IN A DIFFUSION TRANSFER PROCESS COMPRISES A SUPPORT HAVING AN IMAGE RECEIVING LAYER AND HAVING BETWEEN THE SUPPORT AND RECEIVING LAYER, A LAYER COMPRISING COLLOIDAL SIZE INORGANIC PARTICULATE MATERIAL SUCH AS SILICA, ALUMINA, ETC. THE IMAGE RECIVING LAYER CAN BE A NUCLEATED LAYER FOR USE IN BLACK AND WHITE DIFFUSION TRANSFER.
Inventors
- 👤 John A Haefner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:50
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/24; G03C8/26; G03C8/28
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) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |