Patent US4271900A successfully refreshed from Google Patents.
US3273084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable attenuator
Assignee: RCA Corp
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Filing: 1964-03-02
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Granted: 1966-09-13
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Expires: 1984-03-02
Abstract
No abstract record available.
Inventors
- 👤 Joseph F Mcsparran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:13
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/22; H01P1/227
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A VARIABLE ATTENUATOR FOR TRANSMISSION LINES OF THE TYPE INCLUDING A FIRST CONDUCTOR, A SECOND CONDUCTOR, AND MEANS DISPOSING SAID CONDUCTORS IN CLOSE DIELECTRICALLY SPACED PARALLEL RELATION USING A FLAT BOARD OF DIELECTRIC MATERIAL COMPRISING, IN COMBINATION, A SOLID CYLINDER CONSTRUCTED OF DIELECTRIC MATERIAL A THIN, FLEXIBLE SHEET OF DIELECTRIC MATERIAL HAVING A RESISTIVE FILM THEREON WRAPPED AROUND AND BONDED TO SAID CYLINDER WITH SAID RESISTIVE FILM BETWEEN SAID CYLINDER AND SAID SHEET, SUPPORT POSTS MOUNTED ON SAID FLAT BOARD OF DIELECTRIC MATERIAL, MEANS FOR MOUNTING SAID CYLINDER TO SAID SUPPORT POSTS FOR CLOSE BUT FREE ROTATIVE MOVEMENT OVER SAID FIRST CONDUCTOR WITH THE LONGITUDINAL AXIS OF SAID CYLINDER BEING PARALLEL TO AND EQUALLY SPACED FROM SAID FIRST CONDUCTOR.
Claim 2
Dependent Claim
119 words
A VARIABLE ATTENUATOR FOR TRANSMISSION LINES OF THE TYPE INCLUDING A FIRST CONDUCTOR, A SECOND CONDUCTOR, AND MEANS DISPOSING SAID CONDUCTORS IN CLOSE DIELECTRICALLY SPACED PARALLEL RELATION USING A FLAT BOARD OF DIELECTRIC MATERIAL COMPRISING, IN COMBINATION, A SOLID CYLINDER CONSTRUCTED OF DIELECTRIC MATERIAL A THIN, FLEXIBLE SHEET OF DIELECTRIC MATERIAL HAVING A RESISTIVE FILM THEREON WRAPPED AROUND AND BONDED TO SAID CYLINDER WITH SAID RESISTIVE FILM BETWEEN SAID CYLINDER AND SAID SHEET, SUPPORT POSTS MOUNTED ON SAID FLAT BOARD OF DIELECTRIC MATERIAL, MEANS FOR MOUNTING SAID CYLINDER TO SAID SUPPORT POSTS FOR CLOSE BUT FREE ROTATIVE MOVEMENT OVER SAID FIRST CONDUCTOR WITH THE LONGITUDINAL AXIS OF SAID CYLINDER BEING PARALLEL TO AND EQUALLY SPACED FROM SAID FIRST CONDUCTOR.
References Cited (Backward Citations)
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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) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |