Patent US2851419A successfully refreshed from Google Patents.
US2851419A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic material and method
Assignee: US Philips Corp
•
Filing: 1954-02-23
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Granted: 1958-09-09
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Expires: 1974-02-23
Abstract
No abstract record available.
Inventors
- 👤 Gorter Evert Willem
- 👤 Schulkes Johannes Antonius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:25
CPC Classifications
H; H01; H01F; H01F1/00; G; G01; G01K; G01K7/00; G01K7/36; G01K7/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
A MAGNETIC MATERIAL OF WHICH THE REMANENCE MAY REVERSE ITS SIGN BY THE ACTION OF VARIATION IN TEMPERATURE, CONSISTING ESSENTIALLY OF A COMPOUND OF THE FORMULA LI0.5FE(2.5 A)CRAO4, WHEREIN A IS A NUMBER BETWEEN 0.9 AND 1.7.
Claim 2
Dependent Claim
37 words
A MAGNETIC MATERIAL OF WHICH THE REMANENCE MAY REVERSE ITS SIGN BY THE ACTION OF VARIATION IN TEMPERATURE, CONSISTING ESSENTIALLY OF A COMPOUND OF THE FORMULA LI0.5FE(2.5 A)CRAO4, WHEREIN A IS A NUMBER BETWEEN 0.9 AND 1.7.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-08 | 1962-03-10 | 1962-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-08 | 1966-03-10 | 1966-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-08 | 1970-03-10 | 1970-09-09 | $7700.00 | Window Closed / Lapsed |