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US2805446A
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Extrusion head of an apparatus for the manufacture of tubes or hoses from plastic material
Assignee: Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek TNO
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Filing: 1954-12-07
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Granted: 1957-09-10
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Expires: 1974-12-07
Abstract
No abstract record available.
Inventors
- 👤 Bartoo Otto Floris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:42
CPC Classifications
B; B21; B21C; B21C25/00; B29; B29C; B29C48/00; B29C48/03; B29C48/09; B29C48/25; B29C48/30; B29C48/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1956330A
Cited
US2091973A
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US2172243A
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US2566854A
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US2582922A
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US2698964A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |