US2996712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wave-signal direction-indicating apparatus
Assignee: Hazeltine Research Inc
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Filing: 1951-05-05
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Granted: 1961-08-15
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Expires: 1971-05-05
Abstract
No abstract record available.
Inventors
- 👤 Richman Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:00
CPC Classifications
G; G01; G01S; G01S3/00; G01S3/02; G01S3/14
Claims Analysis
Total Claims: 0
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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) | 1964-08-14 | 1965-02-13 | 1965-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-14 | 1969-02-13 | 1969-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-14 | 1973-02-13 | 1973-08-15 | $7700.00 | Window Closed / Lapsed |