Patent US3213382A successfully refreshed from Google Patents.
US3213382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Broadband coupling to comb filter
Assignee: AT&T Inc
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Filing: 1963-09-03
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Granted: 1965-10-19
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Expires: 1983-09-03
Abstract
No abstract record available.
Inventors
- 👤 Marion L Hensel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:42
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/08; B; B60; B60P; B60P3/00; B60P3/06; B60P3/07; H01J; H01J23/00; H01J23/36; H01J23/40; H01J23/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
FOR USE IN AN ELECTROMAGNETIC WAVE TRANSMISSION SYSTEM, A COMB FILTER STRUCTURE COMPRISING: A PLURALITY OF CONDUCTIVE POSTS OF EQUAL LENGTHS; SAID FILTER HAVING AN INNER SECTION OF UNIFORM BANDWIDTH AND OUTER MATCHING SECTIONS; SAID MATCHING SECTIONS HAVING TAPERED PARAMETERS FOR GRADUALLY INCREASING THE BANDWIDTH OF SAID MATCHING SECTION; AND MEANS FOR COUPLING ELECTROMAGNETIC WAVE ENERGY INTO AND OUT OF SAID OUTER SECTIONS.
Claim 2
Dependent Claim
63 words
FOR USE IN AN ELECTROMAGNETIC WAVE TRANSMISSION SYSTEM, A COMB FILTER STRUCTURE COMPRISING: A PLURALITY OF CONDUCTIVE POSTS OF EQUAL LENGTHS; SAID FILTER HAVING AN INNER SECTION OF UNIFORM BANDWIDTH AND OUTER MATCHING SECTIONS; SAID MATCHING SECTIONS HAVING TAPERED PARAMETERS FOR GRADUALLY INCREASING THE BANDWIDTH OF SAID MATCHING SECTION; AND MEANS FOR COUPLING ELECTROMAGNETIC WAVE ENERGY INTO AND OUT OF SAID OUTER SECTIONS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |