US3303443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic device having elliptically shaped opening
Assignee: RCA Corp
•
Filing: 1964-08-31
•
Granted: 1967-02-07
•
Expires: 1984-08-31
Abstract
No abstract record available.
Inventors
- 👤 Mccabe Philip George
- 👤 Lemke Eugene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:00
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/70; H01J29/701; H01J29/702; H01J29/703
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
AN APERTURED PERMANENT MAGNET DEVICE COMPRISING A GENERALLY RING-LIKE CONFIGURATION OF MAGNETIC MATERIAL HAVING AN OUTER EDGE, AND AN INNER EDGE DEFINING THE BOUNDS OF AN APERTURE IN SAID DEVICE, SAID OUTER EDGE HAVING A CIRCULAR CONTOUR AND SAID INNER EDGE HAVING A CONTOUR SUBSTANTIALLY CORRESPONDING TO AN ELLIPSE, SAID RING-LIKE CONFIGURATION OF MAGNETIC MATERIAL BEING MAGNETIZED IN A DIRECTION GENERALLY PARALLEL TO THE MINOR AXIS OF SAID ELLIPSE.
Claim 2
Dependent Claim
69 words
AN APERTURED PERMANENT MAGNET DEVICE COMPRISING A GENERALLY RING-LIKE CONFIGURATION OF MAGNETIC MATERIAL HAVING AN OUTER EDGE, AND AN INNER EDGE DEFINING THE BOUNDS OF AN APERTURE IN SAID DEVICE, SAID OUTER EDGE HAVING A CIRCULAR CONTOUR AND SAID INNER EDGE HAVING A CONTOUR SUBSTANTIALLY CORRESPONDING TO AN ELLIPSE, SAID RING-LIKE CONFIGURATION OF MAGNETIC MATERIAL BEING MAGNETIZED IN A DIRECTION GENERALLY PARALLEL TO THE MINOR AXIS OF SAID ELLIPSE.
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 |