Patent US2023879A successfully refreshed from Google Patents.
US2023879A
Expired / Lapsed
US
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Extrusion press
Assignee: SUN TUBE Corp
•
Filing: 1933-01-09
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Granted: 1935-12-10
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Expires: 1953-01-09
Abstract
No abstract record available.
Inventors
- 👤 John H Friden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:40
CPC Classifications
B; B21; B21C; B21C23/00; B21C23/21; B21C23/218; B21C23/211; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53478
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) | 1938-12-09 | 1939-06-10 | 1939-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-12-09 | 1943-06-10 | 1943-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-12-09 | 1947-06-10 | 1947-12-10 | $7700.00 | Window Closed / Lapsed |