Patent US3606403A successfully refreshed from Google Patents.
US3606403A
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US
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Pipe joint
Assignee: SMITH FIBERGLASS PRODUCTS Inc A DE CORP
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Filing: 1969-07-02
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Granted: 1971-09-20
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Expires: 1989-07-02
Abstract
Abstract IN A FILAMENT WOUND, RESIN REINFORCED PIPE AN IMPROVED JOINT IS PROVIDED BY MEANS OF AN INTERNAL OR FEMALE TAPER AT ONE OF EACH LENGTHS AND A PLURALITY OLF CONTIGUOUS EXTERNAL OR MALE TAPERS AT THE OPPOSITE END THEREOF. PREFERABLY THE MALE TAPERS ARE THREE IN NUMBER WITH THE INNERMOST ONE BEING AT A GREATER ANGLE THAN THE FEMALE TAPER, THE MIDDLE MALE TAPER BEING AT LESS OF AN ANGLE THAN THE FEMALE TAPER AND THE OUTERMOST MALE TAPER BEING AT SUBSTANTIALLY THE SAME ANGLE AS THE FEMALE TAPER.
Inventors
- 👤 Jonas Medney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:32
CPC Classifications
F; F16; F16L; F16L47/00; F16L47/06; B; B29; B29C; B29C65/00; B29C65/56; B29C65/565; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/12; B29C66/122; B29C66/1222; B29C66/1226; B29C66/128; B29C66/1282; B29C66/1286; B29C66/12861; B29C66/12862; B29C66/50; B29C66/51; B29C66/52; B29C66/522; B29C66/5221; F16L47/02
Claims Analysis
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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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |