US4789007A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making compound pipes for conveying various fluids and pipe obtained by this method
Assignee: Individual
•
Filing: 1987-10-08
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Granted: 1988-12-06
•
Expires: 2007-10-08
Abstract
Abstract A method of making a tube for carrying various fluids and materials, the tube comprising from the inside to the outside a layer of impervious plastics material, a first layer of glass fibers connected to the impervious layer, a layer of electrically conducting material and a second layer of glass fibers, the three lastly named layers being impregnated with a resin polymerized through heating of the layer of electrically conducting material which may be a heating metal wire resistor.
Inventors
- 👤 Jacques L. Cretel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:15
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/02; B29C65/34; B29C65/3472; B29C65/3476; B29C35/00; B29C35/02; B29C35/0272; B29C53/00; B29C53/80; B29C53/84; B29C53/845; B29C65/3404; B29C65/342; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/50; B29C66/51; B29C66/52; B29C66/522; B29C66/5227; B29C66/52271; B29C66/52272; B29C66/90; B29C66/91; B29C66/912; B29C66/9121; B29C66/91221; B29C66/914; B29C66/9161; B29C66/91651; B29C66/91655; B29C70/00; B29C70/88; B29C70/882; B29C70/885; F; F16; F16L; F16L9/00; F16L9/12; F16L9/123; F16L9/125; B29C65/3468; B29C66/96; B29C66/961; B29C73/00; B29K; B29K2995/00; B29K2995/0003; B29K2995/0005; B29L; B29L2009/00; B29L2023/00; B29L2023/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A tube for carrying any fluid and comprising from the inside towards the outside thereof; a layer of impervious plastics material; a first tubular layer of continuously circularly woven glass fibers connected to the aforesaid layer; a metal wire conductor spirally wound about said first layer; a second tubular layer of continuously circularly woven glass fibers about said conductor and said first layer; said conductor and said first and second tubular layers being impregnated with resin so as to be connected together with said impervious layer; and said glass fibers of said first and second tubular layers are orthogonally bound or interlaced in skew relationship or along the grain with respect to a centerline axis of said tube
Claim 2
Dependent Claim
118 words
A tube for carrying any fluid and comprising from the inside towards the outside thereof; a layer of impervious plastics material; a first tubular layer of continuously circularly woven glass fibers connected to the aforesaid layer; a metal wire conductor spirally wound about said first layer; a second tubular layer of continuously circularly woven glass fibers about said conductor and said first layer; said conductor and said first and second tubular layers being impregnated with resin so as to be connected together with said impervious layer; and said glass fibers of said first and second tubular layers are orthogonally bound or interlaced in skew relationship or along the grain with respect to a centerline axis of said tube
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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) | 1991-12-06 | 1992-06-06 | 1992-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-12-06 | 1996-06-06 | 1996-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-12-06 | 2000-06-06 | 2000-12-06 | $7700.00 | Window Closed / Lapsed |