Patent US3560294A successfully refreshed from Google Patents.
US3560294A
Expired / Lapsed
US
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Method and apparatus for combining a viscous resin and glass fiber strands
Assignee: PPG Industries Inc
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Filing: 1967-08-29
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Granted: 1971-02-02
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Expires: 1987-08-29
Abstract
Abstract A METHOD AND APPARATUS FOR COMBINING A VISCOUS RESIN AND REINFORCING GLASS FIBER STRANDS. THE RESIN IS DOCTORED ONTO A POLYETHYLENE FILM AND CHOPPED GLASS FIBER STRANDS ARE DEPOSITED ON THE RESIN. ANOTHER POLYETHYLENE FILM CONTAINING A LAYER OF REISN IS ROLLED ONTO THE GLASS FIBER STRANDS TO FORM A COMPOSITE LAMINATE AND THE LAMINATE IS PRESSED TOGETHER. THE LAMINATE IS THEN FLEXED ALTERNATELY UNDER PRESSURE INTO CONVEX AND CONCAVE ARCUATE SHAPES TO CAUSE THE VISCOUS RESIN TO THROUGHLY IMPREGNATE THE CHOPPED STRANDS.
Inventors
- 👤 Edward J Potkanowicz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:46
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29C70/12; B29C70/003; B29C70/08; B29C70/086; B29K; B29K2309/00; B29K2309/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |