US3281848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Attenuator for radiant electromagnetic energy
Assignee: GTE Sylvania Inc
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Filing: 1964-06-29
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Granted: 1966-10-25
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Expires: 1984-06-29
Abstract
No abstract record available.
Inventors
- 👤 Robert S Ames
- 👤 James W Keptner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:57
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/22; H01Q; H01Q17/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A DEVICE ADAPTED TO BE INTERPOSED BETWEEN A DIRECTIONAL TRANSMITTING ANTENNA AND A PROXIMATE, COAXIALLY ALIGNED, DIRECTIONAL RECEIVING ANTENNA FOR ATTENUATING ELECTROMAGNETIC ENERGY TRANSFERRED BETWEEN SAID ANTENNAS AND MINIMIZING REFLECTION EFFECTS THEREBETWEEN SAID DEVICE COMPRISING A PLURALITY OF RADIALLY ARRANGED STRIPS OF RESISTIVE MATERIAL SUPPORTED IN A RIGID FOAM MATERIAL HAVING A DIELECTRIC CONSTANT SUBSTANTIALLY THE SAME AS AIR, THE CENTER OF THE RADIAL ARRANGEMENT BEING COAXIALLY ALIGNED WITH SAID ANTENNAS, SAID STRIPS BEING ORIENTED WITH THE LONGITUDINAL EDGES THEREOF LYING IN THE PLANE OF SAID TRANSMITTING AND RECEIVING ANTENNAS, RESPECTIVELY, AND BEING DIMENSIONED AND HAVING A RESISTANCE VALUE TO PROVIDE A DESIRED ATTENUATION TO ELECTROMAGNETIC ENERGY TRANSFERRED BETWEEN SAID ANTENNAS.
Claim 2
Independent Claim
111 words
A DEVICE ADAPTED TO BE INTERPOSED BETWEEN A DIRECTIONAL TRANSMITTING ANTENNA AND A PROXIMATE, COAXIALLY ALIGNED, DIRECTIONAL RECEIVING ANTENNA FOR ATTENUATING ELECTROMAGNETIC ENERGY TRANSFERRED BETWEEN SAID ANTENNAS AND MINIMIZING REFLECTION EFFECTS THEREBETWEEN SAID DEVICE COMPRISING A PLURALITY OF RADIALLY ARRANGED STRIPS OF RESISTIVE MATERIAL SUPPORTED IN A RIGID FOAM MATERIAL HAVING A DIELECTRIC CONSTANT SUBSTANTIALLY THE SAME AS AIR, THE CENTER OF THE RADIAL ARRANGEMENT BEING COAXIALLY ALIGNED WITH SAID ANTENNAS, SAID STRIPS BEING ORIENTED WITH THE LONGITUDINAL EDGES THEREOF LYING IN THE PLANE OF SAID TRANSMITTING AND RECEIVING ANTENNAS, RESPECTIVELY, AND BEING DIMENSIONED AND HAVING A RESISTANCE VALUE TO PROVIDE A DESIRED ATTENUATION TO ELECTROMAGNETIC ENERGY TRANSFERRED BETWEEN SAID ANTENNAS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |