US3314828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permanent magnets
Assignee: Swift Levick Magnets Ltd
•
Filing: 1964-01-22
•
Granted: 1967-04-18
•
Expires: 1984-01-22
Abstract
No abstract record available.
Inventors
- 👤 Harrison John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:11
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/07; C22C38/00; C22C38/10; C22C38/105; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
AN ANISOTROPIC COLUMNAR CRYSTAL MAGNET CONSITING ESSENTIALY OF:
Claim 2
Dependent Claim
8 words
AN ANISOTROPIC COLUMNAR CRYSTAL MAGNET CONSITING ESSENTIALY OF:
References Cited (Backward Citations)
US2295082A
Cited
US2395285A
Cited
US2797161A
Cited
US2837452A
Cited
US3175901A
Cited
US3144324A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-04-17 | 1970-10-17 | 1971-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-17 | 1974-10-17 | 1975-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-17 | 1978-10-17 | 1979-04-18 | $7700.00 | Window Closed / Lapsed |