Cements containing mineral fibers of high corrosion resistance
Abstract
Abstract MINERAL FIBERS OF HIGH CORROSION RESISTANCE ARE MADE BY EMPLOYING A BASE MATERIAL OR COMPOSITION CONTAINING A PLURALITY OF OXIDES OF METALS FROM AT LEAST ONE OF THE GROUPS II, III, IV AND VIII OF THE PERIODIC TABLE, ADJUSTING THE BASE RAW MATERIAL OR COMPOSITION SO AS TO FURTHERMORE INCLUDE TIO2 IN AN AMOUNT OF AT LEAST 1.5% BY WEIGHT OF THE TOTAL COMPOSITION AND AT LEAST ONE OXIDE OF A METAL FROM THE GROUP II OR IVA IN AN AMOUNT OF AT LEAST 2.5% BY WEIGHT OF THE TOTAL COMPOSITION, MELTING THE SAID RAW MATERIAL OR COMPOSITION, SPINNING THE MOLTEN MASS INTO FIBERS AND THEN COATING THE THUS-FORMED FIBERS WITH A POLYSILOXANE RESIN. THE FIBERS ARE PARTICULARLY SUITED FOR INCORPORATION IN A CEMENT MEDIUM WHERE THERE MAY TOTALLY OR PARTIALLY REPALCE ASBESTOS FIBERS PREVIOUSLY USED FOR THIS PURPOSE.
Inventors
- 👤 V Chvalovsky
- 👤 L Mach
- 👤 H Machova
Bibliographic Details
Claims Analysis
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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) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |