US3315261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wide-band radio wave absorber
Assignee: Eltro GmbH and Co
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Filing: 1961-12-19
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Granted: 1967-04-18
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Expires: 1981-12-19
Abstract
No abstract record available.
Inventors
- 👤 Wesch Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:43
CPC Classifications
H; H01; H01Q; H01Q17/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
AN ELECTROMAGNETIC WAVE ABSORBER WALL EFFECTIVE IN A VERY WIDE FREQUENCY BAND IN THE RANGE OF CENTIMETER WAVELENGTHS, COMPRISING AT LEAST TWO SETS OF ABSORBERS, THE RESONANCE OF THE ABSORBERS OF EACH SET BEING TUNED TO A DIFFERENT WAVELENGTH AND THE RESONANCE OF THE ABSORBERS OF AT LEAST ONE SET BEING TUNED TO A WAVELENGTH WITHIN SAID FREQUENCY BAND, THE ABSORBERS BEING ARRANGED IN A MOSAIC PATTERN TO FORM SAID ABSORBER WALL AND ADJACENT SURFACE AREAS FORMED BY SAID SETS OF ABSORBERS BEING TUNED TO DIFFERENT WAVELENGTHS, THE SURFACE AREAS HAVING THE SAME RESONANCE BEING SPACED APART BY $0/8 TO 5$0, $0 BEING THE WAVELENGTH IN FREE SPACE TO WHICH SAID SURFACE AREAS ARE TUNED.
Claim 2
Dependent Claim
115 words
AN ELECTROMAGNETIC WAVE ABSORBER WALL EFFECTIVE IN A VERY WIDE FREQUENCY BAND IN THE RANGE OF CENTIMETER WAVELENGTHS, COMPRISING AT LEAST TWO SETS OF ABSORBERS, THE RESONANCE OF THE ABSORBERS OF EACH SET BEING TUNED TO A DIFFERENT WAVELENGTH AND THE RESONANCE OF THE ABSORBERS OF AT LEAST ONE SET BEING TUNED TO A WAVELENGTH WITHIN SAID FREQUENCY BAND, THE ABSORBERS BEING ARRANGED IN A MOSAIC PATTERN TO FORM SAID ABSORBER WALL AND ADJACENT SURFACE AREAS FORMED BY SAID SETS OF ABSORBERS BEING TUNED TO DIFFERENT WAVELENGTHS, THE SURFACE AREAS HAVING THE SAME RESONANCE BEING SPACED APART BY $0/8 TO 5$0, $0 BEING THE WAVELENGTH IN FREE SPACE TO WHICH SAID SURFACE AREAS ARE TUNED.
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) | 1970-04-17 | 1970-10-17 | 1971-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-17 | 1974-10-17 | 1975-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-17 | 1978-10-17 | 1979-04-18 | $7700.00 | Window Closed / Lapsed |