US2437829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scalping machine control apparatus
Assignee: Alcoa Corp
•
Filing: 1944-07-25
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Granted: 1948-03-16
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Expires: 1964-07-25
Abstract
No abstract record available.
Inventors
- 👤 Elliott W Mason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:01
CPC Classifications
B; B23; B23C; B23C9/00; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/3042; Y10T409/30784; Y10T409/307952; Y10T409/308008; Y10T409/308064; Y10T409/308624
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2142736A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-16 | 1951-09-15 | 1952-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-16 | 1955-09-15 | 1956-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-16 | 1959-09-15 | 1960-03-16 | $7700.00 | Window Closed / Lapsed |