Patent US2988821A successfully refreshed from Google Patents.
US2988821A
Expired / Lapsed
US
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Simulated perspective display of aircraft landing strip on cathode ray tube
Assignee: Collins Radio Co
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Filing: 1957-08-30
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Granted: 1961-06-20
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Expires: 1977-08-30
Abstract
No abstract record available.
Inventors
- 👤 Victor W Bolie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:00
CPC Classifications
G; G09; G09B; G09B9/00; G09B9/02; G09B9/08; G09B9/30; G09B9/301; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2399671A
Cited
US2780011A
Cited
US2479195A
Cited
US2425950A
Cited
US2604705A
Cited
US2576818A
Cited
US2648782A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |