Patent US3631492A successfully refreshed from Google Patents.
US3631492A
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US
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Multilayer wave absorbing wall
Assignee: Individual
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Filing: 1969-10-03
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Granted: 1971-12-28
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Expires: 1989-10-03
Abstract
Abstract A superwide band wave absorbing wall of a thin multilayer type, which comprising a plate-shaped dielectric layer, a plate-shaped magnetic material lossy material, and a metal plate backing said magnetic material lossy material plate. The plate-shaped dielectric layer may be made in a plurality of the same layer and also may be provided at front surface a tapered part made of a dielectric lossy material.
Inventors
- 👤 Kunihiro Suetake
- 👤 Yasutaka Shimizu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:37
CPC Classifications
H; H01; H01Q; H01Q17/00; H01Q17/008
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
43 words
A multilayer-type wave-absorbing wall comprising a plateshaped dielectric layer disposed at the side upon which the incidence of waves occurs, a magnetic lossy material layer disposed rearwardly of said dielectric layer, and a metal plate disposed rearwardly of said magnetic lossy material layer.
Claim 2
Dependent Claim
43 words
A multilayer-type wave-absorbing wall comprising a plateshaped dielectric layer disposed at the side upon which the incidence of waves occurs, a magnetic lossy material layer disposed rearwardly of said dielectric layer, and a metal plate disposed rearwardly of said magnetic lossy material layer.
Claim 3
Dependent Claim
28 words
A multilayer-type wave-absorbing wall according to claim 1 wherein aid plate-shaped dielectric layer being provided at its front surface with a tapered part of the dielectric lossy material.
Claim 4
Dependent Claim
28 words
A multilayer-type wave-absorbing wall according to claim 1 wherein said plate-shaped dielectric layer being formed of a plurality of component plate-shaped dielectric layers as piled on each other.
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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |