US3560983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Omnidirectional loop antenna
Assignee: VOLKERS RESEARCH CORP
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Filing: 1967-09-12
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Granted: 1971-02-02
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Expires: 1987-09-12
Abstract
Abstract A SINGLE TURN LOOP ANTENNA HAVING A CIRCUMFERENCE OF LESS THAN ONE-HALF OF THE WAVELENGTH OF THE ELECTROMAGNETIC ENERGY TO BE TRANSMITTED OR RECEIVED, AND AN AXIAL DIMENSION FROM 1/2 TO 1/100 OF ITS CIRCUMFERENCE.
Inventors
- 👤 Edward N Willie
- 👤 Walter K Volkers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:11
CPC Classifications
H; H01; H01Q; H01Q7/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |