US3227954A
Expired / Lapsed
US
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Transmit-receive switching circuit utilizing diodes
Assignee: Individual
•
Filing: 1963-05-07
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Granted: 1966-01-04
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Expires: 1983-05-07
Abstract
No abstract record available.
Inventors
- 👤 Jr Walter C Fichter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:33
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/74; H04; H04B; H04B1/00; H04B1/38; H04B1/40; H04B1/44; H04B1/48; Y; Y10; Y10S; Y10S367/00; Y10S367/903
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
106 words
IN A SWITCHING CIRCUIT INVOLVING A TRANSMITTER AND A RECEIVER, A GRID CONTROLLED AMPLIFIER ELECTRON TUBE HAVING AN ANODE AND CATHODE, MEANS UNDER CONTROL OF THE TRANSMITTER FOR APPLYING A POTENTIAL TO THE GRID SUCH AS TO RENDER THE TUBE CONDUCTIVE OR NONCONDUCTIVE, A CONDUCTOR CONNECTED WITH THE INPUT TO THE RECEIVER FEEDING SIGNALS AT HIGH FREQUENCIES TO THE ANODE OF SAID TUBE, SAID CONDUCTOR INCLUDING A DIODE IN SERIES WITH THE ANODE, WHEREBY WHEN THE TUBE IS CONDUCTIVE THE DIODE IS FORWARD BIASED TO CONDUCT HIGH FREQUENCIES THERETHROUGH AND WHEN THE TUBE IS CUT OFF THE FORWARD BIAS ON THE DIODE IS REMOVED SO THAT
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |