US3358089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnet assembly
Assignee: General Electric Co
•
Filing: 1964-06-10
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Granted: 1967-12-12
•
Expires: 1984-06-10
Abstract
No abstract record available.
Inventors
- 👤 Rollin J Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:18
CPC Classifications
H; H04; H04R; H04R9/00; H04R9/02; H04R9/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A PERMANENT MAGNET ASSEMBLY ADAPTED FOR USE IN A PERMANENT MAGNET LOUDSPEAKER COMPRISING A CUP-SHAPED DIRECTIONAL GRAIN PERMANENT MAGNET HAVING A RIM AT A FIRST END THEREOF AND A HOLE AT THE OPPOSITE BASE END THEREOF AND A POLE PIECE CAST INTEGRALLY WITHIN THE HOLE IN THE BASE OF THE CUP-SHAPED MAGNET, THE MAGNET BEING ORIENTED CRYSTALLOGRAPHICALLY AND MAGNETICALLY IN A DIRECTION ALONG THE CONTOUR OF THE CUP-SHAPED MAGNET FROM THE HOLE IN THE
Claim 2
Dependent Claim
74 words
A PERMANENT MAGNET ASSEMBLY ADAPTED FOR USE IN A PERMANENT MAGNET LOUDSPEAKER COMPRISING A CUP-SHAPED DIRECTIONAL GRAIN PERMANENT MAGNET HAVING A RIM AT A FIRST END THEREOF AND A HOLE AT THE OPPOSITE BASE END THEREOF AND A POLE PIECE CAST INTEGRALLY WITHIN THE HOLE IN THE BASE OF THE CUP-SHAPED MAGNET, THE MAGNET BEING ORIENTED CRYSTALLOGRAPHICALLY AND MAGNETICALLY IN A DIRECTION ALONG THE CONTOUR OF THE CUP-SHAPED MAGNET FROM THE HOLE IN THE
References Cited (Backward Citations)
US1951531A
Cited
US1961721A
Cited
US2506609A
Cited
US2964597A
Cited
US3055991A
Cited
US3233295A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-11 | 1971-06-12 | 1971-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-11 | 1975-06-12 | 1975-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-11 | 1979-06-12 | 1979-12-12 | $7700.00 | Window Closed / Lapsed |