US3673029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a threaded filament wound pipe
Assignee: Universal Oil Products Co
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Filing: 1970-07-31
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Granted: 1972-06-27
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Expires: 1990-07-31
Abstract
Abstract An improved threaded filament wound pipe and the method of manufacture thereof. The improvement comprises helically winding resin impregnated fiberglass filaments upon a mandrel knurled at the ends in the form of helical threads. The helpical winding pitch is greater than the thread pitch. As a result, the fiberglass filaments alternately deviate in radial disposition with respect to the pipe axis, thereby forming both interior and exterior pipe threads at the ends of the finished pipe.
Inventors
- 👤 Jack Lowrie Mclarty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:46
CPC Classifications
F; F16; F16L; F16L9/00; F16L9/16; B; B29; B29C; B29C53/00; B29C53/56; B29C53/58; B29C53/583; B29C53/585; B29C65/00; B29C65/48; B29C65/52; B29C65/54; B29C65/56; B29C65/561; B29C65/72; B29C66/00; B29C66/01; B29C66/342; B29C66/50; B29C66/51; B29C66/52; B29C66/522; B29C66/5221; B29C66/5229; B29C66/52291; B29C66/52292; B29C66/52295; B29C66/70; B29C66/72; B29C66/721; B29C66/7212; B29C66/7214; B29C66/72141; B29C66/72143; B29D; B29D1/00; B29D1/005; F16L13/00; F16L13/10; F16L13/11; F16L13/116; F16L47/00; F16L47/16; B29C65/4805; B29C65/483; B29C66/05; B29C66/10; B29C66/11; B29C66/116; B29C66/1162; B29C66/71; B29L; B29L2001/00; B29L2023/00; B29L2023/22
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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |