Patent US1924734A successfully refreshed from Google Patents.
US1924734A
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Method of making tubular materials
Assignee: Alcoa Corp
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Filing: 1931-03-11
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Granted: 1933-08-29
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Expires: 1951-03-11
Abstract
No abstract record available.
Inventors
- 👤 Russell G Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:08
CPC Classifications
B; B21; B21D; B21D15/00; B21D15/02; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12292; Y10T428/12389
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) | 1936-08-28 | 1937-02-27 | 1937-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-08-28 | 1941-02-27 | 1941-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-08-28 | 1945-02-27 | 1945-08-29 | $7700.00 | Window Closed / Lapsed |