US3215925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage regulator
Assignee: AT&T Inc
•
Filing: 1961-10-20
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Granted: 1965-11-02
•
Expires: 1981-10-20
Abstract
No abstract record available.
Inventors
- 👤 John W Rieke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:20
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/02; H02M3/04; H02M3/10; H02M3/125; H02M3/135; H02M3/137; H02M3/142
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
71 words
A VOLTAGE STEP-UP CIRCUIT COMPRISING A SOURCE OF POTENTIAL, A LOD, AND FIRST AND SECOND ENERGY STORAGE DEVICES, MEANS SERIALLY CONNECTING SAID FIRST ENERGY STORAGE DEVICE BETWEEN SAID SOURCE AND SAID LOAD TO STEP-UP THE POTENTIAL ACROSS SAID LOAD BY INTERMITTENTLY DELIVERINT THE SUM OF THE POTENTIAL OF SAID SOURCE AND THE POTENTIAL STORED IN SAID FIRST ENERGY STORAGE DEVICE TO SAID LOAD, AND MEANS SERIALLY CONNECTING SAID SECOND ENERGY STORAGE
References Cited (Backward Citations)
GB618624A
Cited
US2555305A
Cited
US2817803A
Cited
US2791739A
Cited
US2820941A
Cited
US3029386A
Cited
US3106667A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |