US2740113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic antenna systems
Assignee: Bendix Aviation Corp
•
Filing: 1952-01-03
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Granted: 1956-03-27
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Expires: 1972-01-03
Abstract
No abstract record available.
Inventors
- 👤 Alfred A Hemphill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:15
CPC Classifications
H; H01; H01Q; H01Q7/00; H01Q7/06; F; F01; F01D; F01D5/00; F01D5/30; F01D5/3023; F01D5/303; F01D5/3038; H01Q1/00; H01Q1/27; H01Q1/28; H01Q1/286; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1844859A
Cited
US1842347A
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US2266454A
Cited
DE726143C
Cited
US2242200A
Cited
FR874946A
Cited
US2493779A
Cited
US2510698A
Cited
US2581348A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-27 | 1959-09-26 | 1960-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-27 | 1963-09-26 | 1964-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-27 | 1967-09-26 | 1968-03-27 | $7700.00 | Window Closed / Lapsed |