US2419870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal drawing apparatus
Assignee: Alcoa Corp
•
Filing: 1940-06-21
•
Granted: 1947-04-29
•
Expires: 1960-06-21
Abstract
No abstract record available.
Inventors
- 👤 Jr Raynal W Andrews
- 👤 Arthur T Deily
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:15
CPC Classifications
B; B21; B21C; B21C19/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1541424A
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US1496125A
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US1568793A
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US1951073A
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FR798144A
Cited
GB451481A
Cited
GB489388A
Cited
US2196646A
Cited
FR4622M
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-04-28 | 1950-10-28 | 1951-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-04-28 | 1954-10-28 | 1955-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-04-28 | 1958-10-28 | 1959-04-29 | $7700.00 | Window Closed / Lapsed |