US3100194A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferromagnetic material and method of making the same
Assignee: US Philips Corp
•
Filing: 1958-12-29
•
Granted: 1963-08-06
•
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 08:36
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.
References Cited (Backward Citations)
US2565861A
Cited
US2640813A
Cited
US2656319A
Cited
US2685568A
Cited
CH302709A
Cited
US2736708A
Cited
US2723239A
Cited
US2925388A
Cited
FR1100865A
Cited
FR1148861A
Cited
US2989476A
Cited
US2951810A
Cited
US3039966A
Cited
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 |