US3303398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetizer-demagnetizer
Assignee: IG TECHNOLOGIES Inc A CORP OF
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Filing: 1963-08-01
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Granted: 1967-02-07
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Expires: 1983-08-01
Abstract
No abstract record available.
Inventors
- 👤 Gerald T Barta
- 👤 John R Miskell
- 👤 Phillip M Jonas
- 👤 Thomas O Quinn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:53
CPC Classifications
H; H01; H01F; H01F13/00; H01F13/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
A MAGNETIZER-DEMAGNETIZER SYSTEM COMPRISING CAPACITANCE MEANS HAVING A CAPACITANCE DISCHARGE CIRCUIT FOR CONNECTION TO A MAGNETIZING WINDING, A CAPACITANCE CHARGING CIRCUIT FOR SUPPLYING UNIDIRECTIONAL CURRENT TO SAID CAPACITANCE MEANS, A DEMAGNETIZING CIRCUIT FOR SUPPLYING A DEMAGNETIZING CURRENT TO A DEMAGNETIZING WINDING, A MAGNETIZING RELAY HAVING NORMALLY OPEN CONTACTS IN SERIES IN SAID CAPACITANCE DISCHARGE CIRCUIT, DEMAGNETIZING RELAY HAVING NORMALLY OPEN CONTACTS IN SERIES IN SAID DEMAGNETIZING CIRCUIT, SAID MAGNETIZING AND DEMAGNETIZING RELAYS HAVING RESPECTIVE MAGNETIZING AND DEMAGNETIZING RELAY ENERGIZING CIRCUITS FOR ENERGIZATION OF THE RESPECTIVE RELAYS TO SHIFT THE NORMALLY OPEN CONTACTS THEREOF TO CLOSED CONDITION, AT LEAST SAID MAGNETIZING RELAY ENERGIZING CIRCUIT BEING IN SERIES WITH A NORMALLY OPEN CONTACT OF A CONTROL RELAY CONNECTED ACROSS SAID CAPACITANCE MEANS, SAID CONTROL RELAY REQUIRING A PREDETERMINED VOLTAGE ACROSS SAID CAPACITOR MEANS BEFORE BEING ENERGIZED TO SHIFT ITS NORMALLY OPEN CONTACT TO A CLOSED CONDITION, SELECTOR SWITCH MEANS HAVING CONTACTS IN SAID MAGNETIZING AND DEMAGNETIZING RELAY ENERGIZING CIRCUITS AND
Claim 2
Dependent Claim
158 words
A MAGNETIZER-DEMAGNETIZER SYSTEM COMPRISING CAPACITANCE MEANS HAVING A CAPACITANCE DISCHARGE CIRCUIT FOR CONNECTION TO A MAGNETIZING WINDING, A CAPACITANCE CHARGING CIRCUIT FOR SUPPLYING UNIDIRECTIONAL CURRENT TO SAID CAPACITANCE MEANS, A DEMAGNETIZING CIRCUIT FOR SUPPLYING A DEMAGNETIZING CURRENT TO A DEMAGNETIZING WINDING, A MAGNETIZING RELAY HAVING NORMALLY OPEN CONTACTS IN SERIES IN SAID CAPACITANCE DISCHARGE CIRCUIT, DEMAGNETIZING RELAY HAVING NORMALLY OPEN CONTACTS IN SERIES IN SAID DEMAGNETIZING CIRCUIT, SAID MAGNETIZING AND DEMAGNETIZING RELAYS HAVING RESPECTIVE MAGNETIZING AND DEMAGNETIZING RELAY ENERGIZING CIRCUITS FOR ENERGIZATION OF THE RESPECTIVE RELAYS TO SHIFT THE NORMALLY OPEN CONTACTS THEREOF TO CLOSED CONDITION, AT LEAST SAID MAGNETIZING RELAY ENERGIZING CIRCUIT BEING IN SERIES WITH A NORMALLY OPEN CONTACT OF A CONTROL RELAY CONNECTED ACROSS SAID CAPACITANCE MEANS, SAID CONTROL RELAY REQUIRING A PREDETERMINED VOLTAGE ACROSS SAID CAPACITOR MEANS BEFORE BEING ENERGIZED TO SHIFT ITS NORMALLY OPEN CONTACT TO A CLOSED CONDITION, SELECTOR SWITCH MEANS HAVING CONTACTS IN SAID MAGNETIZING AND DEMAGNETIZING RELAY ENERGIZING CIRCUITS AND
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) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |