US3566253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switching type regulators having alternate load current paths
Assignee: AT&T Inc
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Filing: 1969-04-01
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Granted: 1971-02-23
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Expires: 1989-04-01
Abstract
Abstract A SWITCHING TYPE REGULATOR UTILIZES TWO ALTERNATE LOAD CURRENT PATHS WITH INDEPENDENT CURRENT LEVEL CONTROL TO REDUCE THE POWER NORMALLY CARRIED BY THE SWITCHING DEVICE LOCATED IN ONE OF THE LOAD CURRENT PATHS. THE INDEPENDENT CONTROL IS ACHIEVED BY MAGNETICALLY COUPLING THE TWO LOAD CURRENT PATHS WITH APPROPRIATE WINDING RATIOS TO ACHIEVE THE DESIRED CURRENT IN EACH OF THE TWO PATHS.
Inventors
- 👤 John F O'neil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:08
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/02; H02M3/04; H02M3/10; H02M3/145; H02M3/155; H02M3/156
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |