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Patent US3208013A successfully refreshed from Google Patents.
US3208013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic wave absorber comprising inherently resonant filamentary fibers suspended in dielectric
Assignee: Avco Corp
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Filing: 1961-07-31
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Granted: 1965-09-21
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Expires: 1981-07-31
Abstract
No abstract record available.
Inventors
- 👤 Augustus C Walker
- 👤 Litant Irving
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:35
CPC Classifications
H; H01; H01Q; H01Q17/00; H01Q17/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
27 words
AN ELECTROMAGNETIC WAVE ABSORBER COMPRISING: AN ELECTRICALLY NONCONDUCTING MATERIAL; AND INHERENTLY RESONANT FILAMENTARY ELECTRICAL CONDUCTING CARBONACEOUS FIBER MEANS DISPERSED IN A SPACED RELATIONSHIP THROUGHOUT SAID NONCONDUCTING MATERIAL.
Claim 2
Dependent Claim
27 words
AN ELECTROMAGNETIC WAVE ABSORBER COMPRISING: AN ELECTRICALLY NONCONDUCTING MATERIAL; AND INHERENTLY RESONANT FILAMENTARY ELECTRICAL CONDUCTING CARBONACEOUS FIBER MEANS DISPERSED IN A SPACED RELATIONSHIP THROUGHOUT SAID NONCONDUCTING MATERIAL.
References Cited (Backward Citations)
US2293839A
Cited
US2682641A
Cited
US2701861A
Cited
US2977591A
Cited
US3011981A
Cited
US3036280A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |