US3089064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined permanent magnet and electromagnet
Assignee: Societe dElectro Chimie dElectro Metallurgie et des Acieries Electriques Dugine SA SECEMAU
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Filing: 1959-02-03
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Granted: 1963-05-07
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Expires: 1979-02-03
Abstract
No abstract record available.
Inventors
- 👤 Bennetot Michel Cotton De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:12
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/02; H01F7/0231; H01F7/0252; H01F7/0257; B; B41; B41J; B41J9/00; B41J9/26; B41J9/38; H01F7/06; H01F7/20; H01F7/206; H01F2007/208
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A MAGNETIC DEVICE COMPRISING AT LEAST ONE PAIR OF PERMANENT MAGENTS, ARMATURE MEMBERS FORMING WITH AT LEAST SAID ONE PAIR A CLOSED MAGNETIC CIRCUIT AND DEFINING, ON THE OTHER HAND, AT LEAST ONE AIR GAP OUTSIDE SAID CIRCUIT, SAID MAGNETIC DEVICE COMPRISING MEANS ADAPTED TO REVERSE THE DIRECTION OF MAGNETIC POLARIZATION OF ONE OF THE MAGNETS OF AT LEAST SAID ONE PAIR, WHEREBY THE FLUX IS PREVENTED TO CLOSE ALONG THE MAGNETIC CIRCUIT FORMED BY SAID PAIR AND SAID ARMATURE MEMBERS AND CAUSED TO CLOSE THROUGH AT LEAST SAID ONE AIR GAP.
Claim 2
Dependent Claim
92 words
A MAGNETIC DEVICE COMPRISING AT LEAST ONE PAIR OF PERMANENT MAGENTS, ARMATURE MEMBERS FORMING WITH AT LEAST SAID ONE PAIR A CLOSED MAGNETIC CIRCUIT AND DEFINING, ON THE OTHER HAND, AT LEAST ONE AIR GAP OUTSIDE SAID CIRCUIT, SAID MAGNETIC DEVICE COMPRISING MEANS ADAPTED TO REVERSE THE DIRECTION OF MAGNETIC POLARIZATION OF ONE OF THE MAGNETS OF AT LEAST SAID ONE PAIR, WHEREBY THE FLUX IS PREVENTED TO CLOSE ALONG THE MAGNETIC CIRCUIT FORMED BY SAID PAIR AND SAID ARMATURE MEMBERS AND CAUSED TO CLOSE THROUGH AT LEAST SAID ONE AIR GAP.
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) | 1966-05-06 | 1966-11-05 | 1967-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-06 | 1970-11-05 | 1971-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-06 | 1974-11-05 | 1975-05-07 | $7700.00 | Window Closed / Lapsed |