US3234549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Absorber for radio waves
Assignee: MCMILLAN CORP OF NORTH CAROLINA
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Filing: 1961-03-20
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Granted: 1966-02-08
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Expires: 1981-03-20
Abstract
No abstract record available.
Inventors
- 👤 Edward B Mcmillan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:41
CPC Classifications
H; H01; H01Q; H01Q17/00; H01Q17/008
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
AN ABSORBER FOR RADIO WAVES, COMPRISING: A CELLULAR STRUCTURE COMPOSED OF CONTIGUOUS ELONGATED RECTANGULAR WALLS, SAID WALLS BEING FORMED OF EFFECTIVELY NON-CONDUCTIVE DIELECTRIC MATERIAL, AT LEAST SOME OF THE CELL WALLS OF SAID STRUCTURE BEARING UNIFORMLY ELECTRICALLY CONDUCTIVE LOSSY MATERIAL ARRANGED IN A GEOMETRICAL PATTERN SUCH THAT THE TOTAL EFFECTIVE SURFACE DENSITY OF SAID LOSSY MATERIAL WITHIN EACH CELL INCREASES PROGRESSIVLEY FROM ONE END OF SAID CELL TOWARD THE OTHER END THEREOF, THE WAVES TO BE ABSORBED, UPON ENTERING SAID ABSORBER, TRAVELING FROM SAID ONE END OF EACH OF SAID CELLS TOWARD SAID OTHER END THEREOF.
Claim 2
Dependent Claim
96 words
AN ABSORBER FOR RADIO WAVES, COMPRISING: A CELLULAR STRUCTURE COMPOSED OF CONTIGUOUS ELONGATED RECTANGULAR WALLS, SAID WALLS BEING FORMED OF EFFECTIVELY NON-CONDUCTIVE DIELECTRIC MATERIAL, AT LEAST SOME OF THE CELL WALLS OF SAID STRUCTURE BEARING UNIFORMLY ELECTRICALLY CONDUCTIVE LOSSY MATERIAL ARRANGED IN A GEOMETRICAL PATTERN SUCH THAT THE TOTAL EFFECTIVE SURFACE DENSITY OF SAID LOSSY MATERIAL WITHIN EACH CELL INCREASES PROGRESSIVLEY FROM ONE END OF SAID CELL TOWARD THE OTHER END THEREOF, THE WAVES TO BE ABSORBED, UPON ENTERING SAID ABSORBER, TRAVELING FROM SAID ONE END OF EACH OF SAID CELLS TOWARD SAID OTHER END THEREOF.
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) | 1969-02-07 | 1969-08-09 | 1970-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-07 | 1973-08-09 | 1974-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-07 | 1977-08-09 | 1978-02-08 | $7700.00 | Window Closed / Lapsed |