Fiber reinforced tubular article having abrasion resistant liner
Abstract
Abstract A tubular article having an internal abrasion and corrosion resistant liner and a method of forming the same provides an inner layer of cheesecloth impregnated with an epoxy resin with the resin adapted to form an outer layer on the cheesecloth. A layer including a plurality of ceramic spheres each having at least a partial surface coating of metal are secured to the cheesecloth through the bonding provided by the metal coating and resin and are maintained in a confined condition to form the inner liner, such as by an outer layer of cheesecloth impregnated with an epoxy resin which surrounds the layer of ceramic spheres and resin. A plurality of fiber glass filaments impregnated with thermosetting resin surround the inner liner with the entire composite cured to form the fiber reinforced pipe.
Inventors
- 👤 J Fiser
- 👤 R Jackman
- 👤 R James
Bibliographic Details
Claims Analysis
Total Claims: 2References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |