US3276922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing magnetic cores by using electron irradiation
Assignee: Individual
•
Filing: 1964-04-28
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Granted: 1966-10-04
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Expires: 1984-04-28
Abstract
No abstract record available.
Inventors
- 👤 Robert S Sery
- 👤 Daniel I Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:59
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/0302; H01F1/0306
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
67 words
A METHOD OF TREATING A MATERIAL HAVING A HIGH MAGNETIC PERMEABILITY OF CAUSE THE MATERIAL TO EXHIBIT A TRISTABLE HYSTERESIS LOOP COMPRISING THE STEPS OF IRRADIATING THE MATERIAL WITH A BEAM OF ELECTRONS OF ENERGIES GREATER THAN 0.5 M.E.V. FOR A PLURALITY OF INTERMITTENT PREDETERMINED INTERVALS OF TIME, THE SUCCESSIVE INTERVALS BEING SEPARATED BY PREDETERMINED PERIODS OF TIME DURING WHICH THE MATERIAL IS PROTECTED FROM THE ELECTRONS.
References Cited (Backward Citations)
US2968723A
Cited
US3192078A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |