Patent US3100194A successfully refreshed from Google Patents.
US3100194A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferromagnetic material and method of making the same
Assignee: US Philips Corp
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Filing: 1958-12-29
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Granted: 1963-08-06
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Expires: 1978-12-29
Abstract
No abstract record available.
Inventors
- 👤 Burgt Cornelis Martinus Va Der
- 👤 Put Elias
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:56
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/2608
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A FERROMAGNETIC MATERIAL HAVING PIEZOMAGNETIC PROPERTIES AND CONSISTING ESSENTIALLY OF CRYSTALS HAVING A SPINEL STRUCTURE AND A COMPOSITION CORRESPONDING TO ABOUT 29 TO 47 MOL PERCENT OF NIO, ABOUT 3 TO 20 MOL PERCENT OF CUO, ABOUT 0.5 TO 2 MOL PERCENT COO, AND AT LEAST 50 TO ABOUT 52 MOL PERCENT OF FE2O3, SAID MATERIAL HAVING AN ELECTROMECHANICAL COUPLING COEFFICIENT SUBSTANTIALLY EXCEEDING 0.20.
Claim 2
Dependent Claim
64 words
A FERROMAGNETIC MATERIAL HAVING PIEZOMAGNETIC PROPERTIES AND CONSISTING ESSENTIALLY OF CRYSTALS HAVING A SPINEL STRUCTURE AND A COMPOSITION CORRESPONDING TO ABOUT 29 TO 47 MOL PERCENT OF NIO, ABOUT 3 TO 20 MOL PERCENT OF CUO, ABOUT 0.5 TO 2 MOL PERCENT COO, AND AT LEAST 50 TO ABOUT 52 MOL PERCENT OF FE2O3, SAID MATERIAL HAVING AN ELECTROMECHANICAL COUPLING COEFFICIENT SUBSTANTIALLY EXCEEDING 0.20.
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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) | 1966-08-05 | 1967-02-04 | 1967-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-05 | 1971-02-04 | 1971-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-05 | 1975-02-04 | 1975-08-06 | $7700.00 | Window Closed / Lapsed |