Patent US4692273A successfully refreshed from Google Patents.
Patent US3195077A successfully refreshed from Google Patents.
US3195077A
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US
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Semiconductor multisection r-c filter of tapered monolithic construction having progressively varied values of impedance per section
Assignee: Westinghouse Electric Corp
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Filing: 1960-09-06
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Granted: 1965-07-13
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Expires: 1980-09-06
Abstract
No abstract record available.
Inventors
- 👤 Irving F Barditch
- 👤 Robert P Donovan
- 👤 Bento Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:09
CPC Classifications
H; H03; H03H; H03H1/00; H03H1/02; H10; H10D; H10D84/00; H10D84/201; H10D84/204; H10D84/206; H10D99/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
99 words
A MONOLITHIC SEMICONDUCTOR MULTISECTION FILTER DEVICE COMPRISING TWO SEMICONDUCTOR REGIONS OF OPPOSITE CONDUCTIVITY TYPE FORMING A P-N JUNCTION WHICH WHEN REVERSE BIASED PROVIDES A CAPACITANCE, THE REGIONS TAPERERING IN WIDTH ALONG THE LENGTH OF THE DEVICE WHEREBY THE CAPACITANCE PER UNIT LENGTH OF THE REVERSE BIASED JUNCTION PROGRESSIVELY VARIES ALONG THE LENGTH OF THE DEVICE, AT LEAST ONE OF THE SEMCONDUCTOR REGIONS TAPERING IN DEPTH ALONG THE LENGTH OF THE DEVICE TO PROVIDE A PROGRRESSIVELY VARYING VALVE OF RESISTANCE. VARYING IN THE SENSE OPPOSITE TO THE SENSE OF THE VARIATION OF THE CAPACITANCE ALONG THE LENGTH OF SAID DEVICE.
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) | 1968-07-12 | 1969-01-11 | 1969-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-12 | 1973-01-11 | 1973-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-12 | 1977-01-11 | 1977-07-13 | $7700.00 | Window Closed / Lapsed |