US2968835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extrusion die structures
Assignee: Alcoa Corp
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Filing: 1958-03-21
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Granted: 1961-01-24
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Expires: 1978-03-21
Abstract
No abstract record available.
Inventors
- 👤 Jr Samuel C Weston
- 👤 John W Oswald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:04
CPC Classifications
B; B21; B21C; B21C25/00; B21C25/02; B29; B29C; B29C48/00; B29C48/03; B29C48/07; B29C48/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-24 | 1964-07-25 | 1965-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-24 | 1968-07-25 | 1969-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-24 | 1972-07-25 | 1973-01-24 | $7700.00 | Window Closed / Lapsed |