US3881522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unidirectional webbing material
Assignee: Kaiser Glass Fiber Corp
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Filing: 1974-01-28
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Granted: 1975-05-06
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Expires: 1994-01-28
Abstract
Abstract Improved unidirectional webbing material having a low warp to fill weight ratio and comprised of specially coated and spaced generally parallel warp or carrier strands of a synthetic fiber such as fiber glass interwoven with and securely bonded to spaced groupings of glass fiber weft (fill) elements to provide a distortion resistant and rugged fabric useful for the reinforcement of molded plastic articles and the like.
Inventors
- 👤 Albert Lewis
- 👤 Ronald G Krueger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:13
CPC Classifications
D; D03; D03D; D03D15/00; D03D15/40; D03D15/44; D03D15/46; D03D41/00; D03D41/008; F; F16; F16L; F16L9/00; F16L9/16; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/131; Y10T428/1314; Y10T428/29; Y10T428/2913; Y10T428/2973; Y10T428/2975
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A plastic seamless pipe comprising a helically wound relatively distortion resistant unidirectional tape, said tape being comprised of a plurality of relatively widely spaced, smooth surfaced and parallel synthetic fiber warp strands intersecting glass fiber fill elements arranged in weft bundles that are interlaced with and arranged crosswise to said warp strands, the ratio of said warp strands to said weft fill elements being relatively low, said fill elements being bonded to said warp strands at their areas of intersection, said tape having a uniform coating of polymerized plastic fill material on each side thereof and providing a seamless hard walled pipe having said glass fiber fill elements substantially aligned with the longitudinal axis of said pipe.
Claim 2
Dependent Claim
117 words
A plastic seamless pipe comprising a helically wound relatively distortion resistant unidirectional tape, said tape being comprised of a plurality of relatively widely spaced, smooth surfaced and parallel synthetic fiber warp strands intersecting glass fiber fill elements arranged in weft bundles that are interlaced with and arranged crosswise to said warp strands, the ratio of said warp strands to said weft fill elements being relatively low, said fill elements being bonded to said warp strands at their areas of intersection, said tape having a uniform coating of polymerized plastic fill material on each side thereof and providing a seamless hard walled pipe having said glass fiber fill elements substantially aligned with the longitudinal axis of said pipe.
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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) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |