US3989280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe joint
Assignee: Individual
•
Filing: 1973-09-10
•
Granted: 1976-11-02
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Expires: 1993-09-10
Abstract
Abstract A pipe joint between a pipe of reinforced plastic and a second pipe, which may be metal or plastic, and which may have a peripheral shoulder with the plastic material of the first pipe overlapping and interlocking with the shoulder.
Inventors
- 👤 Ing. Walter Schwarz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:51
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/114; B29C66/1142; B29C65/00; B29C65/48; B29C65/50; B29C65/5042; B29C65/56; B29C65/64; B29C66/50; B29C66/51; B29C66/52; B29C66/522; B29C66/5221; B29C66/5229; B29C66/52291; B29C66/52292; B29C66/52297; B29C66/52298; B29C66/55; B29C66/70; B29C66/72; B29C66/721; B29C66/7214; B29C66/72141; B29C66/74; B29C66/742; F; F16; F16L; F16L25/00; F16L25/02; F16L25/03; B29C65/4805; B29C65/483; B29C65/5007; B29C65/5014; B29C65/5021; B29C65/5028; B29C66/112; B29C66/1122; B29C66/303; B29C66/3032; B29C66/30325; B29C66/71; B29C66/712; B29C66/73; B29C66/739; B29C66/7392; B29C66/7394; B29K; B29K2105/00; B29K2105/06; B29K2705/00; B29L; B29L2023/00; B29L2023/22; Y; Y10; Y10S; Y10S285/00; Y10S285/915
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
In a pipe joint where end portions of two pipes are telescopically interfitted, one pipe being of reinforced plastic reinforced by plastic impregnated rovings including the end portion thereof interfitting with the second pipe, and the second pipe being of metal including the end portion interfitting with the pipe of reinforced plastic, the end of the metal pipe being telescoped into the end of the reinforced plastic pipe: said end portion of the metal pipe having a peripheral shoulder thereon, and the plastic impregnated rovings at said end portion of said reinforced plastic pipe being wound tightly about said end portion of the metal pipe to complementally fit all surfaces of said shoulder.
Claim 2
Dependent Claim
113 words
In a pipe joint where end portions of two pipes are telescopically interfitted, one pipe being of reinforced plastic reinforced by plastic impregnated rovings including the end portion thereof interfitting with the second pipe, and the second pipe being of metal including the end portion interfitting with the pipe of reinforced plastic, the end of the metal pipe being telescoped into the end of the reinforced plastic pipe: said end portion of the metal pipe having a peripheral shoulder thereon, and the plastic impregnated rovings at said end portion of said reinforced plastic pipe being wound tightly about said end portion of the metal pipe to complementally fit all surfaces of said shoulder.
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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) | 1979-11-02 | 1980-05-03 | 1980-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-02 | 1984-05-03 | 1984-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-02 | 1988-05-03 | 1988-11-02 | $7700.00 | Window Closed / Lapsed |