US3597249A
Expired / Lapsed
US
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Method of producing composites of inorganic binders and fibers from aqueous slurries
Assignee: Owens Corning
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Filing: 1968-08-21
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Granted: 1971-08-03
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Expires: 1988-08-21
Abstract
Abstract AN IMPROVED METHOD OF PRODUCING FIBER REINFORCED INORGANIC CEMENTITIOUS COMPOSITES FROM AQUEOUS SLURRIES, AS FOR EXAMPLE LIGHT WEIGHT INSULATION MATERIALS COMPRISING ASBESTOS FIBERS BONDED TOGETHER BY A CALCIUM SILICATE CRYSTALLINE BINDER. THE INORGANIC CEMENTITIOUS MATERIAL IS FIRST GROWN UPON THE FIBERS SEPARATED LEAVING THE CEMENTITIOUS MATERIAL BONDED TO THE SURFACE OF THE FIBERS. THE CEMENT COATING FIBERS ARE THEN MIXED INTO ANOTHER SLURRY WITHOUT ADDITIONAL CEMENTITIOUS MATERIALS AND/OR FIBERS, AND THE CEMENT COATED FIBERS USED FOR AT LEAST A NUCLEUS FOR GROWING BINDER CRYSTALS DURING THE HARDENING OF THE CEMENTITIOUS MATERIALS OF THE SLURRY.
Inventors
- 👤 Richard F Shannon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:47
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/18; C04B20/00; C04B20/10; C04B20/1055; C04B20/1077
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) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |