US2035453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treating impure antimony trioxide
Assignee: American Smelting and Refining Co
•
Filing: 1932-07-29
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Granted: 1936-03-31
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Expires: 1952-07-29
Abstract
No abstract record available.
Inventors
- 👤 Jesse O Betterton
- 👤 Roy D Mclellan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:33
CPC Classifications
C; C01; C01G; C01G30/00; C01G30/004; C01G30/005; C01P; C01P2006/00; C01P2006/60
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) | 1939-03-31 | 1939-09-30 | 1940-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-03-31 | 1943-09-30 | 1944-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-03-31 | 1947-09-30 | 1948-03-31 | $7700.00 | Window Closed / Lapsed |