US2601212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat resistant magnetic cores and method of making
Assignee: GAF Chemicals Corp
•
Filing: 1948-11-09
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Granted: 1952-06-17
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Expires: 1968-11-09
Abstract
No abstract record available.
Inventors
- 👤 Wladimir J Polydoroff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:18
CPC Classifications
H; H01; H01F; H01F41/00; H01F41/02; H01F41/0206; H01F41/0246; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/20; H01F1/22; H01F1/24; H01F1/26; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2927; Y10T428/2933; Y10T428/294; Y10T428/2958
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A MAGNETIC CORE SUITABLE FOR HIGH TEMPERATURE, BEING FREQUENCY PURPOSES, MADE UP OF A COMPACT MASS OF FINELY DIVIDED FEEEO-MAGNETIC PARTICLES OF SPHERICAL SHAPE HAVING AN AVERAGE DIAMETER OF 3-20 MICRONS, AND HAVING AN INSULATING COATING OF AN INSOLUBLE METAL PHOSPHATE
Claim 2
Dependent Claim
41 words
A MAGNETIC CORE SUITABLE FOR HIGH TEMPERATURE, BEING FREQUENCY PURPOSES, MADE UP OF A COMPACT MASS OF FINELY DIVIDED FEEEO-MAGNETIC PARTICLES OF SPHERICAL SHAPE HAVING AN AVERAGE DIAMETER OF 3-20 MICRONS, AND HAVING AN INSULATING COATING OF AN INSOLUBLE METAL PHOSPHATE
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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) | 1955-06-17 | 1955-12-17 | 1956-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-17 | 1959-12-17 | 1960-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-17 | 1963-12-17 | 1964-06-17 | $7700.00 | Window Closed / Lapsed |