US3139567A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of permanently magnetizing bodies
Assignee: S Smith and Sons Ltd
•
Filing: 1961-03-23
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Granted: 1964-06-30
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Expires: 1981-03-23
Abstract
No abstract record available.
Inventors
- 👤 Atkinson Bruce Wilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:59
CPC Classifications
H; H01; H01F; H01F13/00; H01F13/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A METHOD OF MAGNETIZING A PERMANENTLY-MAGNETIZABLE DISC-SHAPED BODY SO AS TO PRODUCE POLES AT A PLURALITY OF LOCATIONS AROUND THE PERIPHERY COMPRISING THE STEPS OF SUBJECTING THE BODY TO A FIRST MAGNETIC FIELD SO AS TO POLARIZE ITS OPPOSED FACES, AND SUBSEQUENTLY SUBJECTING THE BODY TO A SECOND MAGNETIC FIELD SO AS TO POLARIZE IT IN THE REQUIRED PERIPHERAL LOCATIONS, CONCENTRATION OF THE SECOND FIELD AT THE REQUIRED PERIPHERAL LOCATIONS BEING ASSISTED BY THE POLARIZATION OF THE FACES.
Claim 2
Independent Claim
78 words
A METHOD OF MAGNETIZING A PERMANENTLY-MAGNETIZABLE DISC-SHAPED BODY SO AS TO PRODUCE POLES AT A PLURALITY OF LOCATIONS AROUND THE PERIPHERY COMPRISING THE STEPS OF SUBJECTING THE BODY TO A FIRST MAGNETIC FIELD SO AS TO POLARIZE ITS OPPOSED FACES, AND SUBSEQUENTLY SUBJECTING THE BODY TO A SECOND MAGNETIC FIELD SO AS TO POLARIZE IT IN THE REQUIRED PERIPHERAL LOCATIONS, CONCENTRATION OF THE SECOND FIELD AT THE REQUIRED PERIPHERAL LOCATIONS BEING ASSISTED BY THE POLARIZATION OF THE FACES.
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) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |