Patent US3474459A successfully refreshed from Google Patents.
US3474459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical display system using controlled deflections of a collimated beam of radiant energy
Assignee: Pan American Petroleum Corp
•
Filing: 1968-01-08
•
Granted: 1969-10-21
•
Expires: 1988-01-08
Abstract
No abstract record available.
Inventors
- 👤 Daniel Silverman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:34
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/28; G01V1/34; G01D; G01D15/00; G01D15/14; G09; G09G; G09G3/00; G09G3/02; G11; G11B; G11B7/00; G11B7/12; G11B7/125
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-20 | 1973-04-21 | 1973-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-20 | 1977-04-21 | 1977-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-20 | 1981-04-21 | 1981-10-21 | $7700.00 | Window Closed / Lapsed |