Patent US3346780A successfully refreshed from Google Patents.
US3346780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controllable supply or feed circuit for electromagnetic vibrators
Assignee: ENTWICKLUNGSANSTALT fur IND EL
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Filing: 1965-01-04
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Granted: 1967-10-10
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Expires: 1985-01-04
Abstract
No abstract record available.
Inventors
- 👤 Klix Uwe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:12
CPC Classifications
H; H02; H02K; H02K33/00; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/72; H03K17/725
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
CONTROLLABLE ALTERNATING CURRENT SUPPLY CIRCUIT FOR ELECTROMAGNETIC VIBRATORS COMPRISING A VIBRATOR COIL, A CONTROLLED SEMICONDUCTOR RECTIFIER CONNECTED IN SERIES WITH SAID VIBRATOR COIL, AN OHMIC RESISTOR BRIDGING SAID CONTROLLED SEMICONDUCTOR RECTIFIER, AND A VOLTAGE-LIMITING BRANCH CIRCUIT BRIDGING SAID CONTROLLED SEMICONDUCTOR RECTIFIER.
Claim 2
Dependent Claim
41 words
CONTROLLABLE ALTERNATING CURRENT SUPPLY CIRCUIT FOR ELECTROMAGNETIC VIBRATORS COMPRISING A VIBRATOR COIL, A CONTROLLED SEMICONDUCTOR RECTIFIER CONNECTED IN SERIES WITH SAID VIBRATOR COIL, AN OHMIC RESISTOR BRIDGING SAID CONTROLLED SEMICONDUCTOR RECTIFIER, AND A VOLTAGE-LIMITING BRANCH CIRCUIT BRIDGING SAID CONTROLLED SEMICONDUCTOR RECTIFIER.
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) | 1970-10-09 | 1971-04-10 | 1971-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-09 | 1975-04-10 | 1975-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-09 | 1979-04-10 | 1979-10-10 | $7700.00 | Window Closed / Lapsed |