Patent US2640813A successfully refreshed from Google Patents.
US2640813A
Expired / Lapsed
US
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Reaction product of a mixed ferrite and lead titanate
Assignee: Aladdin Industries LLC
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Filing: 1948-06-26
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Granted: 1953-06-02
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Expires: 1968-06-26
Abstract
No abstract record available.
Inventors
- 👤 Berge Godshalk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:33
CPC Classifications
H; H01; H01F; H01F17/00; H01F17/04; C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/2608; C04B35/2625
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A MAGNETIC CORE FORMED OF THE THERMAL REACTION PRODUCT OF LEAD METATITANATE WITH THE THERMAL REACTION PRODUCT OF IRON OXIDE CALCULATED AS FE2O3, ZINC OXIDE CALCULATED AS ZNO AND THE OXIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF MAGNESIUM, MANGANESE, NICKEL AND COBALT AND MIXTURES THEREOF CALCULATED AS MGO, MNO, NI2O3 AND CO2O3 RESPECTIVELY.
Claim 2
Dependent Claim
56 words
A MAGNETIC CORE FORMED OF THE THERMAL REACTION PRODUCT OF LEAD METATITANATE WITH THE THERMAL REACTION PRODUCT OF IRON OXIDE CALCULATED AS FE2O3, ZINC OXIDE CALCULATED AS ZNO AND THE OXIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF MAGNESIUM, MANGANESE, NICKEL AND COBALT AND MIXTURES THEREOF CALCULATED AS MGO, MNO, NI2O3 AND CO2O3 RESPECTIVELY.
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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) | 1956-06-01 | 1956-12-01 | 1957-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-01 | 1960-12-01 | 1961-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-01 | 1964-12-01 | 1965-06-02 | $7700.00 | Window Closed / Lapsed |