Patent US3128216A successfully refreshed from Google Patents.
US3128216A
Expired / Lapsed
US
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Method and apparatus for making fiber reinforced plastic pipe
Assignee: AO Smith Corp
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Filing: 1959-04-20
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Granted: 1964-04-07
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Expires: 1979-04-20
Abstract
No abstract record available.
Inventors
- 👤 Daniel J Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:42
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/80; B29C53/82; B29C53/821; B29C53/828; B29C31/00; B29C31/002; B29C53/56; B29C53/58; B29C53/581; B29C53/60; B29C53/68; B29C53/8008; B29C53/8016; B65; B65H; B65H51/00; B65H51/14; B29C2793/00; B29C2793/009; B29L; B29L2023/00; B29L2023/22; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53126
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
100 words
A METHOD OF FABRICATING A TUBULAR ARTICLE, COMPRISING ADVANCING A MANDREL LONGITUDINALLY THROUGH THE CENTRAL OPENINGS IN A SERIES OF SPACED AXIALLY ALIGNED COILED STRIPS OF REINFORCING MATERIAL IMPREGNATED WITH A PARTIALLY CURED SOLID RESIN, GUIDING AN END OF EACH STRIP ONTO THE MANDREL AT SPACED LOCATIONS THEREON, ROTATING EACH ALTERNATE COILED STRIP IN THE OPPOSITE DIRECTION TO WIND EACH ALTERNATE STRIP ON THE MANDREL WITH THE GENERALLY OPPOSITE HELIX ANGLE TO THAT OF THE INTERMEDATE STRIPS IN SAID SERIES AND THEREBY FORM SAID TUBULAR ARTICLE, HEATING EACH STRIP AS IT IS APPLIED TO THE MANDREL TO MELT THE RESIN.
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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) | 1967-04-07 | 1967-10-07 | 1968-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-07 | 1971-10-07 | 1972-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-07 | 1975-10-07 | 1976-04-07 | $7700.00 | Window Closed / Lapsed |