US3618504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical development process and apparatus
Assignee: Horizons Research Inc
•
Filing: 1968-10-09
•
Granted: 1971-11-09
•
Expires: 1988-10-09
Abstract
Abstract AN APPARATUS FOR RENDERING VISIBLE, THE FAINTLY VISIBLE OR ENTIRELY INVISIBLE LATENT IMAGE PRODUCED BY PHOTOGRAPHIC EXPOSURE OF A FREE RADICAL FILM TO A SMALL DOSE OF RADIATION, THE APPARATUS BEING ADAPTED TO PROCESS THE FILM BY DRY MEANS ONLY.
Inventors
- 👤 Richard A Fotland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:11
CPC Classifications
G; G03; G03D; G03D13/00; G03D13/007; G03D7/00
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) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |