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US2721275A
Expired / Lapsed
US
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Method of and means for detecting aircraft
Assignee: Individual
•
Filing: 1935-02-21
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Granted: 1955-10-18
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Expires: 1955-02-21
Abstract
No abstract record available.
Inventors
- 👤 Albert M Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:52
CPC Classifications
G; G01; G01S; G01S17/00; G01S17/02; G01S17/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
AT42464B
Cited
US1385657A
Cited
US1385696A
Cited
US1781799A
Cited
US1770497A
Cited
US1936514A
Cited
US1844146A
Cited
GB384325A
Cited
US1954204A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-17 | 1959-04-18 | 1959-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-17 | 1963-04-18 | 1963-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-17 | 1967-04-18 | 1967-10-18 | $7700.00 | Window Closed / Lapsed |