US3583034A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extrusion head
Assignee: LAVORAZIONE MAT PLAST
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Filing: 1969-02-26
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Granted: 1971-06-08
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Expires: 1989-02-26
Abstract
Abstract EXTRUSION HEAD OF AXIAL TYPE FOR EXTRUDING TUBING OF THERMOPLASTIC MATERIAL, MORE PARTICULARLY A FOAM TUBING, INCLUDING A HEAD BODY AND A MANDREL SUPPORTED IN THE BODY BY A SPIDER PLATE FORMED WITH A PLURALITY OF RADIAL FINS, WHEREIN THE MANDREL COMPRISES A BULGED INTERMEDIATE SECTION INCLUDING SAID SPIDER PLATE AND FINS, AND WHEREIN ONE AT LEAST OF THE RADIALLY INNER AND RADIALLY OUTER WALLS OF THE PASSAGES BETWEEN THE FINS COMPRISES A SLOPE WHICH IS LOCATED IN THE TRAILING EDGE REGION OF THE FINS THEREBY TO RESTRICT THE RADIAL WIDTH OF SAID PASSAGES IN SAID REGION.
Inventors
- 👤 Roberto Colombo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:43
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/36; B29C44/46; B29C44/50; B29C44/507; B29C48/00; B29C48/03; B29C48/09; B29C48/10; B29C48/25; B29C48/30; B29C48/32; B29C48/325; B29C48/88; B29C48/90; B29C48/901; B29C48/902; B29C48/001; B29C48/0018; B29L; B29L2023/00
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) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |