Patent US3239750A successfully refreshed from Google Patents.
US3239750A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic voltage stabilizer
Assignee: Fritz Hellige und Co GmbH
•
Filing: 1962-10-04
•
Granted: 1966-03-08
•
Expires: 1982-10-04
Abstract
No abstract record available.
Inventors
- 👤 Weber Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:37
CPC Classifications
G; G05; G05F; G05F3/00; G05F3/02; G05F3/04; G05F3/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
75 words
A VOLTAGE STABILIZER FOR PROVIDING A SUBSTANTIALLY CONSTANT OUTPUT VOTLAGE IN RESPONSE TO WIDELY VARYING APPLIED INPUT VOLTAGES COMPRISING: A FIRST SATURABLE REACTOR; A PARALLEL RESONANT CIRCUIT INCLUDING A SECOND SATURABLE REACTOR AND A CAPACITOR; MEANS FOR APPLYING LINE VOLTAGE TO SAID PARALLEL RESONANT CIRCUIT THROUGH SAID FIRST SATURABLE REACTOR, SAID PARALLEL RESONANT CIRCUIT BEING ADJUSTED TO RESONANCE AT A VALUE OF APPLIED INPUT VOLTAGE SUBSTANTIALLY CORRESPONDING TO THE UPPER LIMIT OF INPUT VOLTAGE FOR
References Cited (Backward Citations)
US1948704A
Cited
GB315844A
Cited
US2088621A
Cited
GB583497A
Cited
US2436925A
Cited
US2858455A
Cited
DE1032387B
Cited
US2801383A
Cited
US2997644A
Cited
US2814738A
Cited
US2983862A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |