US2985939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making a ferromagnetic core having a predetermined permeability
Assignee: Philips Laboratories Inc
•
Filing: 1958-06-18
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Granted: 1961-05-30
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Expires: 1978-06-18
Abstract
No abstract record available.
Inventors
- 👤 Frank G Brockman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:04
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/34; H01F1/342; H01F1/344; C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/265; Y; Y10; Y10S; Y10S264/00; Y10S264/57; Y10S264/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2241441A
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US2648804A
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US2830320A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-29 | 1964-11-28 | 1965-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-29 | 1968-11-28 | 1969-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-29 | 1972-11-28 | 1973-05-30 | $7700.00 | Window Closed / Lapsed |