US3900048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforced thermoplastic pipe
Assignee: Owens Corning
•
Filing: 1974-02-14
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Granted: 1975-08-19
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Expires: 1994-02-14
Abstract
Abstract A method of reinforcing thermoplastic structures by controllably overwrapping the structures with continuous glass strands impregnated with a solvent solution of a thermoplastic resin whereby the outside surface of the structure is attacked by the solvent to fuse the impregnated strands to the thermoplastic structure, thereby creating an integrally reinforced structure having no interface between the thermoplastic structure and the thermoplastic resin impregnant and having the strands locked in the structure.
Inventors
- 👤 Allan B Isham
- 👤 Iii Wilbur Shenk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:47
CPC Classifications
F; F16; F16L; F16L9/00; F16L9/12; Y; Y10; Y10S; Y10S138/00; Y10S138/02; Y10S138/07; Y10S273/00; Y10S273/07; Y10T; Y10T428/00; Y10T428/13; Y10T428/131; Y10T428/1314
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A PIPE COMPRISING AN UNREINFORCED TUBULAR LAYER COMPRISING A POLYVINYL CHLORIDE TUBE PLACED UNDER COMPRESSION BY CRISS-CROSSING FILAMENT WOUND IMPREGNATED STRANDS OF GLASS FIBERS THE IMPREGNANT OF WHICH COMPRISES FROM 35 TO 55 PERCENT BY VOLUME OF THE IMPREGNATED STRAND OF A THERMOPLASTIC NONCROSSLINKING MATERIAL AID IMPREGNANT BEING SELECTED FROM THE GROUP CONSISTING OF POLYVINYL CHLORIDE CHLORINATED POLYVINYL CHLORIDE ACRYLONITRILE-BUTADIENE-STYRENE TERPOLYMER AND MIXTURES OF SAID ACRYLONITRILE BUTADIENE-STYRENE TERPOLYMER AND VINYL RESINS SAID IMPREGNATED STRANDS BEING PARTIALLY EMBEDDED IN SAID LAYER OF THERMOPLASTIC RESIN AND BEING SOLVENT-FUSED TO EACH OTHER AND TO SAID TUBULAR LAYER TO ENCAPSULATE AND PROTECT THE FIBERS.
Claim 2
Dependent Claim
100 words
A PIPE COMPRISING AN UNREINFORCED TUBULAR LAYER COMPRISING A POLYVINYL CHLORIDE TUBE PLACED UNDER COMPRESSION BY CRISS-CROSSING FILAMENT WOUND IMPREGNATED STRANDS OF GLASS FIBERS THE IMPREGNANT OF WHICH COMPRISES FROM 35 TO 55 PERCENT BY VOLUME OF THE IMPREGNATED STRAND OF A THERMOPLASTIC NONCROSSLINKING MATERIAL AID IMPREGNANT BEING SELECTED FROM THE GROUP CONSISTING OF POLYVINYL CHLORIDE CHLORINATED POLYVINYL CHLORIDE ACRYLONITRILE-BUTADIENE-STYRENE TERPOLYMER AND MIXTURES OF SAID ACRYLONITRILE BUTADIENE-STYRENE TERPOLYMER AND VINYL RESINS SAID IMPREGNATED STRANDS BEING PARTIALLY EMBEDDED IN SAID LAYER OF THERMOPLASTIC RESIN AND BEING SOLVENT-FUSED TO EACH OTHER AND TO SAID TUBULAR LAYER TO ENCAPSULATE AND PROTECT THE FIBERS.
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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) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |