Patent US3007641A successfully refreshed from Google Patents.
Patent US3623099A successfully refreshed from Google Patents.
US3623099A
Expired / Lapsed
US
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Superwide band wave absorber
Assignee: Individual
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Filing: 1969-12-17
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Granted: 1971-11-23
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Expires: 1989-12-17
Abstract
Abstract A wave absorber composed of a wave-absorbing ferrite wall in combination with a zigzag wave-absorbing dielectric wall disposed on the front side of the ferrite wall which can absorb superwide band waves wherein frequencies between the range of about 100 MHz. and 1,000 MHz. are absorbed by the ferrite wall and frequencies greater than 1,000 MHz. are absorbed by the dielectric wall. The aforementioned abstract is neither intended to define the invention of the application which, of course, is measured by the claims, nor is it intended to be limiting as to the scope of the invention in any way.
Inventors
- 👤 Kunihiro Suetake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:49
CPC Classifications
H; H01; H01Q; H01Q17/00; H01Q17/008
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
27 words
A super-wide band wave absorber comprising a wave-absorbing wall composed of a ferrite plate and a zig-zag wave-absorbing wall disposed in the front of said ferrite plate.
Claim 2
Dependent Claim
27 words
A super-wide band wave absorber comprising a wave-absorbing wall composed of a ferrite plate and a zig-zag wave-absorbing wall disposed in the front of said ferrite plate.
Claim 3
Dependent Claim
36 words
A super-wide band wave absorber as in claim 1 wherein thE allowable reflective coefficient of the wave absorber is less than 0.1 and the frequency band begins at 100 MHz. and extends to over 1,000 MHz.
Claim 4
Dependent Claim
30 words
A super-wide band wave absorber as in claim 1 wherein said ferrite plate is about 0.3 inches in thickness and said zig-zag wave-absorbing wall is about 12 inches in thickness.
Claim 5
Dependent Claim
21 words
A wave absorber as in claim 1 wherein said zig-zag wave-absorbing wall is of a dielectric material including a graphite composition.
Claim 6
Dependent Claim
45 words
A nonreflecting room for use in electromagnetic waves wherein the walls are coated with wave absorbers, said wave absorber comprising a ferrite plate of about 0.3 inches thickness and a zig-zag dielectric wall of about 12 inches thick disposed in front of said ferrite plate.
Claim 7
Dependent Claim
45 words
A nonreflecting room for use in electromagnetic waves wherein the walls are coated with wave absorbers, said wave absorber comprising a ferrite plate of about 0.3 inches thickness and a zig-zag dielectric wall of about 12 inches thick disposed in front of said ferrite plate.
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) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |