Patent US1891235A successfully refreshed from Google Patents.
US1891235A
Expired / Lapsed
US
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Manufacture of magnetic material
Assignee: International Standard Electric Corp
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Filing: 1930-05-20
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Granted: 1932-12-20
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Expires: 1950-05-20
Abstract
No abstract record available.
Inventors
- 👤 Lawton George
- 👤 Dearden William Hoghton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:49
CPC Classifications
C; C21; C21D; C21D8/00; C21D8/12; C21D8/1277; Y; Y10; Y10S; Y10S29/00; Y10S29/028; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/928; Y10S428/9335; Y10S428/941; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12806; Y10T428/12826; Y10T428/12847; Y10T428/12854
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) | 1935-12-20 | 1936-06-20 | 1936-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-12-20 | 1940-06-20 | 1940-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-12-20 | 1944-06-20 | 1944-12-20 | $7700.00 | Window Closed / Lapsed |