Patent US3135930A successfully refreshed from Google Patents.
US3135930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impedance-simulating network
Assignee: AT&T Inc
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Filing: 1961-05-12
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Granted: 1964-06-02
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Expires: 1981-05-12
Abstract
No abstract record available.
Inventors
- 👤 Monte Robert W De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:09
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/02; H04B3/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A TWO-TERMINAL NETWORK ADAPTED TO SIMULATE THE IMPEDANCE ZK OF A LOADED TRANSMISSION LINE TERMINATED IN A FRACTIONAL SECTION OVER A FREQUENCY BAND INCLUDING THE CUT-OFF FREQUENCY FC COMPRISING A PI-TYPE SECTION AND A TERMINATING RESISTOR OF VALUE R, THE SECTION COMPRISING TWO SHUNT IMPEDANCE BRANCHES AND AN INTERPOSED SERIES IMPEDANCE BRANCH, THE FIRST SHUNT BRANCH INCLUDING A CAPACITOR OF VALUE C4 CONNECTED BETWEEN THE NETWORK TERMINALS, THE SERIES BRANCH INCLUDING THE PARALLEL COM-
Claim 2
Dependent Claim
74 words
A TWO-TERMINAL NETWORK ADAPTED TO SIMULATE THE IMPEDANCE ZK OF A LOADED TRANSMISSION LINE TERMINATED IN A FRACTIONAL SECTION OVER A FREQUENCY BAND INCLUDING THE CUT-OFF FREQUENCY FC COMPRISING A PI-TYPE SECTION AND A TERMINATING RESISTOR OF VALUE R, THE SECTION COMPRISING TWO SHUNT IMPEDANCE BRANCHES AND AN INTERPOSED SERIES IMPEDANCE BRANCH, THE FIRST SHUNT BRANCH INCLUDING A CAPACITOR OF VALUE C4 CONNECTED BETWEEN THE NETWORK TERMINALS, THE SERIES BRANCH INCLUDING THE PARALLEL COM-
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) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |