Manufacture of glass fibers
Abstract
Abstract THE CONTINUOUS PRODUCTION OF A MAT OF GLASS FIBERS HAVING HIGH TEMPERATURE-RESISTANT CHARACTERISTICS IS MADE POSSIBLE BY THE FORMATION OF THE MAT FROM FRESHLY MADE FIBERS, EXCEEDING ONE MICRON IN DIAMETER, OF A GLASS COMPOSITION HAVING A PREDETERMINED CONTENT OF SILICA AND ALKALI OXIDE, RANGING FROM 66% TO 73% OF THE FORMER, AND 34% TO 27% OF THE LATTER, WITH LESS THAN 5% OF STABILIZING METALLIC OXIDES OF THE DIVALENT AND TRIVALENT GROUPS, SO THAT WHEN THE FRESHLY FORMED MAT IS PASSED THROUGH AN AQUEOUS MINERAL ACID LEACHING BATH IMMEDIATELY FOLLOWING IST FORMATION, THE MAT FIBERS IS TRANSFORMED TO ONE ESSENTIALLY OF SILICA IN THE COURSE OF A PERIOD NO LONGER THAN THREE MINUTES.
Inventors
- 👤 Stephane De Lajarte
- 👤 Jean Asolo
Bibliographic Details
Claims Analysis
Total Claims: 0References 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) | 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 |