US3404398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Terrain following system employing intermittent radiation
Assignee: Boeing North American Inc
•
Filing: 1967-06-12
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Granted: 1968-10-01
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Expires: 1987-06-12
Abstract
No abstract record available.
Inventors
- 👤 Thomas W Hoban
- 👤 Richard L Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:06
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02; G01S13/00; G01S13/88; G01S13/93; G01S13/933; G01S13/935
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3302198A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-01 | 1972-04-01 | 1972-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-01 | 1976-04-01 | 1976-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-01 | 1980-04-01 | 1980-10-01 | $7700.00 | Window Closed / Lapsed |