US2597237A
Expired / Lapsed
US
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Variable loss paramagnetic cores
Assignee: RCA Corp
•
Filing: 1948-06-25
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Granted: 1952-05-20
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Expires: 1968-06-25
Abstract
No abstract record available.
Inventors
- 👤 Albert W Friend
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:26
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/20; H01F1/22; H01F1/24; H01F17/00; H01F17/04; H01F17/045; Y; Y10; Y10S; Y10S264/00; Y10S264/46; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/928; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49075; Y10T29/49076; Y10T428/00; Y10T428/12; Y10T428/12458
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
A FERROMAGNETIC CORE FOR TUNING INDUCTANCES AND THE LIKE, COMPRISING A BODY OF FERROMAGNETIC PARTICLES AND A CARBONACEOUS BINDER HAVING ELECTRICALLY CONDUCTING CARBONIZED PARTICLES INCLUDED THEREIN IN INCREASING CONCENTRATION PER UNIT OF VOLUME ALONG A PREDETERMINED DIRECTION THROUGH
Claim 2
Dependent Claim
38 words
A FERROMAGNETIC CORE FOR TUNING INDUCTANCES AND THE LIKE, COMPRISING A BODY OF FERROMAGNETIC PARTICLES AND A CARBONACEOUS BINDER HAVING ELECTRICALLY CONDUCTING CARBONIZED PARTICLES INCLUDED THEREIN IN INCREASING CONCENTRATION PER UNIT OF VOLUME ALONG A PREDETERMINED DIRECTION THROUGH
References Cited (Backward Citations)
US2172548A
Cited
US1793757A
Cited
US1878539A
Cited
US1881711A
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US2064773A
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US2192743A
Cited
US2268782A
Cited
US2418467A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-20 | 1955-11-19 | 1956-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-20 | 1959-11-19 | 1960-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-20 | 1963-11-19 | 1964-05-20 | $7700.00 | Window Closed / Lapsed |