Patent US3248662A successfully refreshed from Google Patents.
US3248662A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave amplifier
Assignee: Bendix Corp
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Filing: 1962-04-18
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Granted: 1966-04-26
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Expires: 1982-04-18
Abstract
No abstract record available.
Inventors
- 👤 Dudley C Brownell
- 👤 Donald J Dickens
- 👤 Gary R Hoffman
- 👤 Donald W Macglashan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:32
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/04; H03F3/10; H03F3/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A LOW-NOISE NEGATIVE RESISTANCE AMPLIFIER FOR USE AT MICROWAVE FREQUENCIES COMPRISING A TUNNEL DIODE, A SOURCE OF DIRECT CURRENT POWER CONNECTED TO SAID DIODE, VARIABLE REACTANCE MEANS CONNECTED TO SAID DIODE; AND A FERRITE CIRCULATOR HAVING FIRST CONNECTIONS TO AN INPUT SOURCE OF MICROWAVE SIGNALS, SECOND CONNECTIONS ACROSS SAID TUNNEL DIODE AND SAID SERIES TUNING STUB, AND THIRD CONNECTIONS TO AN OUTPUT DEVICE, SAID CIRCULATOR INCLUDING A CONDUCTOR CONNECTOR TO ALL OF SAID FIRST, SECOND AND THIRD CONNECTIONS, A FERRITE
Claim 2
Dependent Claim
80 words
A LOW-NOISE NEGATIVE RESISTANCE AMPLIFIER FOR USE AT MICROWAVE FREQUENCIES COMPRISING A TUNNEL DIODE, A SOURCE OF DIRECT CURRENT POWER CONNECTED TO SAID DIODE, VARIABLE REACTANCE MEANS CONNECTED TO SAID DIODE; AND A FERRITE CIRCULATOR HAVING FIRST CONNECTIONS TO AN INPUT SOURCE OF MICROWAVE SIGNALS, SECOND CONNECTIONS ACROSS SAID TUNNEL DIODE AND SAID SERIES TUNING STUB, AND THIRD CONNECTIONS TO AN OUTPUT DEVICE, SAID CIRCULATOR INCLUDING A CONDUCTOR CONNECTOR TO ALL OF SAID FIRST, SECOND AND THIRD CONNECTIONS, A FERRITE
References Cited (Backward Citations)
US2975377A
Cited
US2977482A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |