US3578547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated fiber-reinforced sheet of polymeric material
Assignee: Turner Brothers Asbestos Co Ltd
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Filing: 1969-04-28
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Granted: 1971-05-11
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Expires: 1989-04-28
Abstract
Abstract A RIGID SHEET OF A POLYMERIC MATERIAL HAVING LOOSE FIBERS DISPERSED THROUGHOUT THE SHEET AND RANDOMLY ORIENTED AND PREDOMINANTLY LYING IN THE PLANE OF THE SHEET IS PRODUCED BY FEEDING A HOMOGENEOUS DOUGH-LIKE MASS FORMED FROM A SOLUTION OR EMULSION OF THE POLYMERIC MATERIAL AND THE LOOSE FIBERS INTO THE NIP BETWEEN TWO CALENDER BOWLS, ONE OF WHICH IS HEATED, AND BUILDING THE MATERIAL UP IN LAMINATIONS ON ONE OF THE BOWLS.
Inventors
- 👤 George Leonard Wicker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:33
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/02; E04C2/26; B; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29C70/12; E04C2/10; E04C2/20; E04C2/22; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24132; Y10T428/249921; Y10T428/249924; Y10T428/24994; Y10T428/249949; Y10T428/24995; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964
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) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |