Patent US3722550A successfully refreshed from Google Patents.
US3722550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite tubing and method for making the same
Assignee: FLUROCARBON COMPANY
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Filing: 1970-03-10
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Granted: 1973-03-27
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Expires: 1990-03-10
Abstract
Abstract A composite tubing product and method for making the same, the tubing includes an elastomeric polyurethane inner core tube having a peripheral zone of elastomeric, adhesively activated core tube material on the outer surface of the tube, a stranded reinforcement layer elastomerically secured to the core tube by the adhesively activated material, and an outer sheath disposed around the reinforcement layer. In another form, an additional reinforcement layer may be disposed around the first reinforcement layer, and such additional layer is generally free of securement to the first layer.
Inventors
- 👤 R Matthews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:17
CPC Classifications
B; B29; B29D; B29D23/00; B29D23/001; F; F16; F16L; F16L11/00; F16L11/04; F16L11/08; F16L11/085
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
58 words
A composite tubing product in accordance with claim 1, wherein said product further comprises: at least a second reinforcement layer disposed in encompassing relation around said first mentioned layer, and said second reinforcement layer being substantially free of bonded securement to said first mentioned layer; and the outer sheath disposed in encompassing engagement with the second reinforcement layer.
Claim 2
Dependent Claim
23 words
A composite tubing product in accordance with claim 2, including an elastomeric polyurethane adhesive material bonding said sheath to said second reinforcement layer.
Claim 3
Dependent Claim
42 words
A composite tubing product in accordance with claim 1, wherein each of the strands of said reinforcement layer which engages said core tube has from about 5 percent to about 75 percent of its exposed peripheral surface area capsulated in said bondment.
Claim 4
Dependent Claim
34 words
A composite tubing product in accordance with claim 1, wherein, said thermoplastic, elastomeric polyurethane core tube material has an ultimate tensile strength of at least about 6,000 pounds per square inch at ambient temperature.
References Cited (Backward Citations)
US2470599A
Cited
GB562328A
Cited
US3116760A
Cited
US3310447A
Cited
US3245431A
Cited
US3489631A
Cited
US3500867A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |