US3411111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mast for loop direction finding system
Assignee: United States Department of the Army
•
Filing: 1965-11-05
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Granted: 1968-11-12
•
Expires: 1985-11-05
Abstract
No abstract record available.
Inventors
- 👤 Jr Elmer A Meyers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:22
CPC Classifications
G; G01; G01S; G01S3/00; G01S3/02; G01S3/04; G01S3/06; H; H01; H01Q; H01Q21/00; H01Q21/24; H01Q21/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A MAST FOR A DIRECTION FINDING ANTENNA COMPRISING: AN ELONGATED TUBULAR MAST; A SHIELDED CABLE EXTENDING THROUGHOUT THE ENTIRE LENGTH OF SAID TUBULAR MAST; A HOLLOW FERRITE CYLINDER SUPPORTED WITHIN SAID TUBULAR MAST, SAID CABLE PASSING THROUGH THE HOLLOW PORTION OF SAID FERRITE CYLINDER; MEANS FOR INSULATING SAID CABLE FROM SAID FERRITE CYLINDER THROUGHOUT THE LENGTH OF SAID FERRITE CYLINDER EXCEPT AT THE EXTREME TOP END THEREOF; MEANS FOR CONDUC-
Claim 2
Dependent Claim
70 words
A MAST FOR A DIRECTION FINDING ANTENNA COMPRISING: AN ELONGATED TUBULAR MAST; A SHIELDED CABLE EXTENDING THROUGHOUT THE ENTIRE LENGTH OF SAID TUBULAR MAST; A HOLLOW FERRITE CYLINDER SUPPORTED WITHIN SAID TUBULAR MAST, SAID CABLE PASSING THROUGH THE HOLLOW PORTION OF SAID FERRITE CYLINDER; MEANS FOR INSULATING SAID CABLE FROM SAID FERRITE CYLINDER THROUGHOUT THE LENGTH OF SAID FERRITE CYLINDER EXCEPT AT THE EXTREME TOP END THEREOF; MEANS FOR CONDUC-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-12 | 1972-05-13 | 1972-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-12 | 1976-05-13 | 1976-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-12 | 1980-05-13 | 1980-11-12 | $7700.00 | Window Closed / Lapsed |