US3079535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable strength permanent magnets
Assignee: Laboratory Equipment Corp
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Filing: 1955-11-22
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Granted: 1963-02-26
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Expires: 1975-11-22
Abstract
No abstract record available.
Inventors
- 👤 Carl E Schultz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:34
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/02; H01F7/0205; H01F7/0226; Y; Y10; Y10T; Y10T292/00; Y10T292/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A MAGNETIC DEVICE COMPRISING: A THIN WAFER OF ALKALINE EARTH MAGNETIC FERRITE CERAMIC MATERIAL OF EXTREMELY HIGH COERCIVE FORCE, SAID WAFER BEING MAGNETIZED SO AS TO HAVE OPPOSITE POLES UPON OPPOSITE LARGE AREA SURFACES THEREOF, A PAIR OF MAGNET POLE FORMING MEMBERS OF LOW ENERGY MAGNETIC MATERIAL HAVING A PAIR OF FACES SEPARATED BY A DISTANCE SUFFICIENT TO PERMIT THE INSERTION THEREBETWEEN OF SAID CERAMIC WAFER BUT NOT SUBSTANTIALLY GREATER, SAID FACES HAVING OPPOSED AREAS WHICH SUBSTANTIALLY ENCOMPASS SAID WAFER LARGE AREA SURFSCES WHEN SAID WAFER
Claim 2
Dependent Claim
86 words
A MAGNETIC DEVICE COMPRISING: A THIN WAFER OF ALKALINE EARTH MAGNETIC FERRITE CERAMIC MATERIAL OF EXTREMELY HIGH COERCIVE FORCE, SAID WAFER BEING MAGNETIZED SO AS TO HAVE OPPOSITE POLES UPON OPPOSITE LARGE AREA SURFACES THEREOF, A PAIR OF MAGNET POLE FORMING MEMBERS OF LOW ENERGY MAGNETIC MATERIAL HAVING A PAIR OF FACES SEPARATED BY A DISTANCE SUFFICIENT TO PERMIT THE INSERTION THEREBETWEEN OF SAID CERAMIC WAFER BUT NOT SUBSTANTIALLY GREATER, SAID FACES HAVING OPPOSED AREAS WHICH SUBSTANTIALLY ENCOMPASS SAID WAFER LARGE AREA SURFSCES WHEN SAID WAFER
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) | 1966-02-25 | 1966-08-27 | 1967-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-25 | 1970-08-27 | 1971-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-25 | 1974-08-27 | 1975-02-26 | $7700.00 | Window Closed / Lapsed |