Patent US1869025A successfully refreshed from Google Patents.
US1869025A
Expired / Lapsed
US
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Magnetic material and method of producing same
Assignee: Westinghouse Electric Corp
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Filing: 1931-05-26
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Granted: 1932-07-26
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Expires: 1951-05-26
Abstract
No abstract record available.
Inventors
- 👤 John B Seastone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:32
CPC Classifications
C; C21; C21D; C21D8/00; C21D8/12; C21D1/00; C21D1/78; C22; C22F; C22F1/00; C22F1/10
Claims Analysis
Total Claims: 0
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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) | 1935-07-26 | 1936-01-25 | 1936-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-07-26 | 1940-01-25 | 1940-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-07-26 | 1944-01-25 | 1944-07-26 | $7700.00 | Window Closed / Lapsed |