Patent US3788916A successfully refreshed from Google Patents.
US3788916A
Expired / Lapsed
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Method and apparatus for manufacturing reinforced plastic cylinders
Assignee: Gadelius Inter SA
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Filing: 1972-01-03
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Granted: 1974-01-29
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Expires: 1992-01-03
Abstract
Abstract A method of manufacturing glass-fibre reinforced plastic cylinders comprising the steps of applying a liquid plastic composition to the inside of a rotary molding cylinder to disperse the plastic evenly over the interior surface of the cylinder by the action of centrifugal force, and introducing reinforcing material into the cylinder to form a uniform layer on the plastic layer, the reinforcing material being pressed into the plastic layer by centrifugal force and by means of a roller.
Inventors
- 👤 G Gadelius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:09
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/28; B29C70/30; B29C70/32; B29C70/323; B29C70/326; B29C41/00; B29C41/02; B29C41/04; B29C41/042; B29K; B29K2105/00; B29K2105/06; B29K2105/12
Claims Analysis
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References Cited (Backward Citations)
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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) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |