US3832259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for manufacturing a transversely or helically grooved plastic tube with a smooth inner wall
Assignee: IND ONDEENEMING WAVIN NV
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Filing: 1972-01-10
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Granted: 1974-08-27
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Expires: 1992-01-10
Abstract
Abstract The invention related to a method of manufacturing a composite plastic tube whereby an inner plastic tube with a smooth inner wall is positioned into an outer plastic tube provided with transverse or helical grooves and pins are acting upon part of the valleys of the outer tube. In this way the inner and outer tube are deformed and connected in a non-slidable way.
Inventors
- 👤 Zon C Van
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:23
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/02; B29C65/18; B26; B26F; B26F1/00; B26F1/0015; B26F1/0046; B26F1/0061; B29C63/00; B29C63/18; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/13; B29C66/131; B29C66/20; B29C66/21; B29C66/50; B29C66/51; B29C66/52; B29C66/522; B29C66/5227; B29C66/52271; B29C66/52272; B29C66/70; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B29C66/80; B29C66/82; B29C66/822; B29C66/8222; B29C66/8226; B29C66/82263; B29C66/8227; B29C66/83; B29C66/834; B29C66/8351; B29C66/83541; F; F16; F16L; F16L9/00; F16L9/12; F16L9/127; B29C66/71; B29L; B29L2023/00; B29L2023/18; B29L2023/186
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) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |