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US1853544A
Expired / Lapsed
US
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Process of making silicon steel from silicon scrap
Assignee: Individual
•
Filing: 1931-07-31
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Granted: 1932-04-12
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Expires: 1951-07-31
Abstract
No abstract record available.
Inventors
- 👤 Vere B Browne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:42
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/52; C22; C22C; C22C33/00; C22C33/04; Y; Y02; Y02P; Y02P10/00; Y02P10/20
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) | 1935-04-12 | 1935-10-12 | 1936-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-04-12 | 1939-10-12 | 1940-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-04-12 | 1943-10-12 | 1944-04-12 | $7700.00 | Window Closed / Lapsed |