US3140457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gradiated magnetic flux path produced by plurality of transverse ducts
Assignee: Unisys Corp
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Filing: 1962-05-28
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Granted: 1964-07-07
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Expires: 1982-05-28
Abstract
No abstract record available.
Inventors
- 👤 William C Heithaus
- 👤 Charles D Schwebel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:46
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/215
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
MEANS FOR PROVIDING A GRADIENT IN MAGNETIC FLUX DENSITY COMPRISING A NORTH POLE MEMBER AND A SOUTH POLE MEMBER, SAID NORTH AND SOUTH POLE MEMBERS TERMINATING IN FLAT FACES PARALLEL TO BUT SPACED FROM EACH OTHER, A FLAT MAGNETICALLY PERMEABLE POLE PIECE DISPOSED BETWEEN THE FACES OF SAID NORTH AND SOUTH POLE MEMBERS, SAID POLE PIECE CHARACTERIZED IN THAT IT CONTAINS A PLURALITY OF DUCTS CLOSELY SPACED IN REGIONS OF DESIRED LOW FLUX DENSITY AND RELATIVELY WIDELY SPACED IN REGIONS OF DESIRED HIGH FLUX DENSITY.
Claim 2
Dependent Claim
85 words
MEANS FOR PROVIDING A GRADIENT IN MAGNETIC FLUX DENSITY COMPRISING A NORTH POLE MEMBER AND A SOUTH POLE MEMBER, SAID NORTH AND SOUTH POLE MEMBERS TERMINATING IN FLAT FACES PARALLEL TO BUT SPACED FROM EACH OTHER, A FLAT MAGNETICALLY PERMEABLE POLE PIECE DISPOSED BETWEEN THE FACES OF SAID NORTH AND SOUTH POLE MEMBERS, SAID POLE PIECE CHARACTERIZED IN THAT IT CONTAINS A PLURALITY OF DUCTS CLOSELY SPACED IN REGIONS OF DESIRED LOW FLUX DENSITY AND RELATIVELY WIDELY SPACED IN REGIONS OF DESIRED HIGH FLUX DENSITY.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-07 | 1968-01-06 | 1968-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-07 | 1972-01-06 | 1972-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-07 | 1976-01-06 | 1976-07-07 | $7700.00 | Window Closed / Lapsed |