US2778494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extrusion apparatus for thin-walled hollow tubing
Assignee: Individual
•
Filing: 1952-12-17
•
Granted: 1957-01-22
•
Expires: 1972-12-17
Abstract
No abstract record available.
Inventors
- 👤 Kreidler Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:28
CPC Classifications
B; B21; B21C; B21C26/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49833; Y10T29/49908; Y10T29/49925; Y10T29/49934
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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FR516653A
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US1935286A
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DE720543C
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US2231761A
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US2451773A
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FR921713A
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GB625919A
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US2738064A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-22 | 1960-07-23 | 1961-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-22 | 1964-07-23 | 1965-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-22 | 1968-07-23 | 1969-01-22 | $7700.00 | Window Closed / Lapsed |