Patent US3559042A successfully refreshed from Google Patents.
US3559042A
Expired / Lapsed
US
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Polyphase symmetrical network
Assignee: International Standard Electric Corp
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Filing: 1969-05-19
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Granted: 1971-01-26
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Expires: 1989-05-19
Abstract
Abstract SYMMETRICAL POLYPHASE NETWORKS ARE DISCLOSED COMPRISING AT LEAST ONE POLYPHASE NETWORK SECTION INCLUDING N SINGLE PHASE CIRCUITS, EACH OF THE CIRCUITS HAVING A FIRST IMPEDANCE COUPLED BETWEEN THE INPUT AND OUTPUT TERMINALS OF AN ASSOCIATED ONE OF THE CIRCUITS. THE INPUT TERMINAL OF EACH ONE OF THE N CIRCUITS IS ALSO COUPLED TO THE OUTPUT TERMINAL OF ONE OF THE CIRCUITS RESPONDING TO AN ADJACENT PHASE (LEADING OR LAGGING) OF THE INPUT SIGNAL BY A SECOND IMPEDANCE HAVING A DIFFERENT PHASE ANGLE CHARACTERISTIC THAN THAT OF THE FIRST IMPEDANCE. WHEN TWO OR MORE NETWORKS ARE PROVIDED THEY ARE CONNECTED IN CASCADE.
Inventors
- 👤 Michael John Gingell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:48
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/18; H03H7/21
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |