Patent US3222548A successfully refreshed from Google Patents.
US3222548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rf protection circuit
Assignee: Individual
•
Filing: 1963-09-30
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Granted: 1965-12-07
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Expires: 1983-09-30
Abstract
No abstract record available.
Inventors
- 👤 Richard J Sanford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:16
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/72; H03K17/73; H04; H04B; H04B15/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
AN ELECTRICAL CIRCUIT DESIGNED TO PROTECT CIRCUIT ELEMENTS AGAINST R-F ENERGY COMPRISING: A CONTROLLED RECTIFIER HAVING AN ANODE, A CATHODE, AND A GATE ELECTRODE, FIRST AND SECOND INPUT TERMINAL MEANS FOR RECEIVING D.C. AND R-F SIGNALS, SAID FIRST INPUT TERMINAL MEANS CONNECTED TO SAID ANODE, FIRST AND SECOND RESISTORS CONNECTED IN SERIES BETWEEN SAID FIRST AND SECOND INPUT TERMINAL MEANS, CAPACITOR MEANS HAVING A FIRST PLATE THEREOF CONNECTED TO THE JUNCTION POINT OF SAID RESISTORS AND SAID GATE ELECTRODE AND THE SECOND PLATE THEREOF CONNECTED TO SAID SECOND INPUT TERMINAL MEANS, AND OUTPUT TERMINAL MEANS CONNECTED TO THE CATHODE ELECTRODE FOR SUPPLYING ONLY D.C. SIGNALS TO A LOAD CONNECTABLE BETWEEN SAID OUTPUT TERMINAL MEANS AND SAID SECOND INPUT TERMINAL MEANS WHEN BOTH D.C. AND SPURIOUS R-F SIGNALS ARE PRESENT AT SAID INPUT TERMINAL MEANS, SAID CAPACITOR MERANS AND SAID FIRST RESISTOR PROVIDING R-F SIGNAL BLOCKING THEREBY PREVENTING ANY SPURIOUS R-F SIGNAL FROM FIRING SAID CONTROLLED RECTIFIER.
Claim 2
Dependent Claim
156 words
AN ELECTRICAL CIRCUIT DESIGNED TO PROTECT CIRCUIT ELEMENTS AGAINST R-F ENERGY COMPRISING: A CONTROLLED RECTIFIER HAVING AN ANODE, A CATHODE, AND A GATE ELECTRODE, FIRST AND SECOND INPUT TERMINAL MEANS FOR RECEIVING D.C. AND R-F SIGNALS, SAID FIRST INPUT TERMINAL MEANS CONNECTED TO SAID ANODE, FIRST AND SECOND RESISTORS CONNECTED IN SERIES BETWEEN SAID FIRST AND SECOND INPUT TERMINAL MEANS, CAPACITOR MEANS HAVING A FIRST PLATE THEREOF CONNECTED TO THE JUNCTION POINT OF SAID RESISTORS AND SAID GATE ELECTRODE AND THE SECOND PLATE THEREOF CONNECTED TO SAID SECOND INPUT TERMINAL MEANS, AND OUTPUT TERMINAL MEANS CONNECTED TO THE CATHODE ELECTRODE FOR SUPPLYING ONLY D.C. SIGNALS TO A LOAD CONNECTABLE BETWEEN SAID OUTPUT TERMINAL MEANS AND SAID SECOND INPUT TERMINAL MEANS WHEN BOTH D.C. AND SPURIOUS R-F SIGNALS ARE PRESENT AT SAID INPUT TERMINAL MEANS, SAID CAPACITOR MERANS AND SAID FIRST RESISTOR PROVIDING R-F SIGNAL BLOCKING THEREBY PREVENTING ANY SPURIOUS R-F SIGNAL FROM FIRING SAID CONTROLLED RECTIFIER.
References Cited (Backward Citations)
US3128455A
Cited
US3143706A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |