Patent US3574810A successfully refreshed from Google Patents.
US3574810A
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Method for manufacturing pipes possessing thermoplastic reinforcement
Assignee: Pneumatiques Caoutchouc Manufacture et Plastiques Kleber Colombes SA
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Filing: 1968-03-13
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Granted: 1971-04-13
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Expires: 1988-03-13
Abstract
Abstract RING IS EXTRUDED INSIDE THE CYLINDER: THE POINT OF APPLICATION OF THE REINFORCING RING AND THE CYLINDER BEING RELATIVELY ROTATED ALONG THE AXIS OF THE CYLINDER ITSELF. THIS INVENTION RELATES TO THE MANUFACTURE OF THERMOPLASTICS PIPES IN WHICH A REINFORCEMENT IS CONTAINED WITHIN A WALL THEREOF, THE REINFORCEMENT ALSO BEING MADE FROM THERMOPLASTICS MATERIAL AND IN THE FORM OF A HELICALLY WOUND RING. IN ACCORDANCE WITH THIS INVENTION, A CONTINUOUS CYLINDER IS EXTRUDED IN A MACHINE TO FORM THE WALL OF THE PIPE AND, IN THE SAME MACHINE, THE REINFORCING
Inventors
- 👤 Jacques Tournery
- 👤 Fernand Tuyeras
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:14
CPC Classifications
F; F16; F16L; F16L11/00; F16L11/04; F16L11/08; B; B29; B29C; B29C48/00; B29C48/15; B29C48/151; B29C48/152; B29C48/153; F16L9/00; F16L9/12; F16L9/127; F16L9/128; B29C48/03; B29C48/09
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1974-04-12 | 1974-10-12 | 1975-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-12 | 1978-10-12 | 1979-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-12 | 1982-10-12 | 1983-04-13 | $7700.00 | Window Closed / Lapsed |