US2574907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extrusion apparatus
Assignee: National Rubber Machinery Co
•
Filing: 1949-09-09
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Granted: 1951-11-13
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Expires: 1969-09-09
Abstract
No abstract record available.
Inventors
- 👤 Hans E Bucken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:53
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/78; B29C48/80; B29C48/83; B29C48/832; B29C48/03; B29C48/86; B29C48/865
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2433936A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-12 | 1955-05-14 | 1955-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-12 | 1959-05-14 | 1959-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-12 | 1963-05-14 | 1963-11-13 | $7700.00 | Window Closed / Lapsed |