US2764552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferromagnetic materials
Assignee: International Standard Electric Corp
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Filing: 1953-01-29
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Granted: 1956-09-25
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Expires: 1973-01-29
Abstract
No abstract record available.
Inventors
- 👤 Buckley Sidney Ernest
- 👤 Owen Douglas Hiley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:53
CPC Classifications
A; A23; A23J; A23J1/00; A23J1/16; C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/265; C04B35/2658
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A SINTERED FERROMAGNETIC MATERIAL OF THE SPINEL TYPE CONSISTING ESSENTIALLY OF A MIXTURE OF APPROXIMATELY 50 MOLE PER CENT FE2O3, 25 MOLE PER CENT MNO AND 25 MOLE PER CENT ZNO, TOGETHER WITH THE ADDITION OF A SILICATE SELECTED FROM THE GROUP CONSISTING OF MANGANOUS SILICATE, AND FERROUS SILICATE, SAID SILICATE BEING PRESENT IN AN AMOUNT BETWEEN 1 AND 6.6 PER CENT BY WEIGHT OF SAID MIXTURE OF OXIDES AND HAVING A MELTING POINT IN THE REGION OF 1100* C.
Claim 2
Dependent Claim
80 words
A SINTERED FERROMAGNETIC MATERIAL OF THE SPINEL TYPE CONSISTING ESSENTIALLY OF A MIXTURE OF APPROXIMATELY 50 MOLE PER CENT FE2O3, 25 MOLE PER CENT MNO AND 25 MOLE PER CENT ZNO, TOGETHER WITH THE ADDITION OF A SILICATE SELECTED FROM THE GROUP CONSISTING OF MANGANOUS SILICATE, AND FERROUS SILICATE, SAID SILICATE BEING PRESENT IN AN AMOUNT BETWEEN 1 AND 6.6 PER CENT BY WEIGHT OF SAID MIXTURE OF OXIDES AND HAVING A MELTING POINT IN THE REGION OF 1100* C.
References Cited (Backward Citations)
US2551711A
Cited
US2565111A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-25 | 1960-03-26 | 1960-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-25 | 1964-03-26 | 1964-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-25 | 1968-03-26 | 1968-09-25 | $7700.00 | Window Closed / Lapsed |