US3403403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: United States Department of the Army
•
Filing: 1966-03-08
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Granted: 1968-09-24
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Expires: 1986-03-08
Abstract
No abstract record available.
Inventors
- 👤 James E Howell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:45
CPC Classifications
H; H01; H01Q; H01Q15/00; H01Q15/0006; H01Q15/0013
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A FILTER MEANS COMPRISING A DEVICE HAVING A FIRST PLURALITY OF RADIATION PICKUP MEANS, EACH OF SAID PICKUP MEANS HAVING A FIRST AND A SECOND END, FIRST MEANS ELECTRICALLY CONNECTING THE FIRST ENDS TO EACH OTHER, A PLURALITY OF TRANSMISSION LINE MEANS INDIVIDUALLY CONNECTED TO THE SECOND ENDS OF SAID PICKUP MEANS, AND EACH TRANSMISSION MEANS BEING A QUATER-WAVE OPEN CIRCUIT TRANSMISSION LINE FOR PREDETERMINED FREQUENCY, WHEREBY FOR RADIATION AT SAID FREQUENCY EACH OF SAID PICKUP MEANS WILL APPEAR TO BE SHORT CIRCUITED.
Claim 2
Dependent Claim
83 words
A FILTER MEANS COMPRISING A DEVICE HAVING A FIRST PLURALITY OF RADIATION PICKUP MEANS, EACH OF SAID PICKUP MEANS HAVING A FIRST AND A SECOND END, FIRST MEANS ELECTRICALLY CONNECTING THE FIRST ENDS TO EACH OTHER, A PLURALITY OF TRANSMISSION LINE MEANS INDIVIDUALLY CONNECTED TO THE SECOND ENDS OF SAID PICKUP MEANS, AND EACH TRANSMISSION MEANS BEING A QUATER-WAVE OPEN CIRCUIT TRANSMISSION LINE FOR PREDETERMINED FREQUENCY, WHEREBY FOR RADIATION AT SAID FREQUENCY EACH OF SAID PICKUP MEANS WILL APPEAR TO BE SHORT CIRCUITED.
References Cited (Backward Citations)
US3142808A
Cited
US3213456A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-24 | 1972-03-25 | 1972-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-24 | 1976-03-25 | 1976-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-24 | 1980-03-25 | 1980-09-24 | $7700.00 | Window Closed / Lapsed |