US3275408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods for the production of vitreous silica
Assignee: Thermal Syndicate Ltd
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Filing: 1964-01-06
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Granted: 1966-09-27
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Expires: 1984-01-06
Abstract
No abstract record available.
Inventors
- 👤 Winterburn John Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:21
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/06; C01; C01B; C01B33/00; C01B33/113; C01B33/12; C01B33/18; C01B33/181; C01B33/183; C03B; C03B19/00; C03B19/14; C03B19/1415; C03B19/1423; C03B37/00; C03B37/01; C03B37/012; C03B37/014; C03B37/01413; C03B37/0142; C03B37/01426; C03C17/00; C03C17/02; C01P; C01P2004/00; C01P2004/80; C01P2004/82; C01P2004/84; C03C2201/00; C03C2201/02; C03C2203/00; C03C2203/40; C03C2203/42; C03C2203/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A METHOD OF PRODUCING A TRANSPARENT BODY OF VITREOUS, HYDROGEN-FREE SILICA, COMPRISING THE STEPS OF FROM ING AN OXYGEN-CONTAINING, HYDROGEN-FREE GAS STREAM HAVING DISTRIBUTED THERETHROUGH A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF SILICON AND OXIDIZABLE, VAPORIZALBE HYDROGEN-FREE SILICON COMPOUNDS, SAID GAS STREAM BEING AT A SUFFICIENTLY HIGH TEMPERATURE TO VAPORIZE SAID SUBSTANCE AND TO OXIDIZE THE SAME UNDER FORMATION OF SILICA AND TO MAINTAIN THE THUS-FORMED SILICA AT AT LEAST ITS FUSING TEMPERATURE; DIRECTING THE THUS-FORMED SILICA-CONTAINING GAS STREAM AGAINST A REFRACTORY SUPPORT SO AS TO IMPINGE THEREON AND TO DEPOSIT SAID SILICA ON THE SAME IN THE FORM OF A BODY OF FUSED, HYDROGEN-FREE, TRAMSPAENT, VITEROUS SILICA.
Claim 2
Independent Claim
109 words
A METHOD OF PRODUCING A TRANSPARENT BODY OF VITREOUS, HYDROGEN-FREE SILICA, COMPRISING THE STEPS OF FROM ING AN OXYGEN-CONTAINING, HYDROGEN-FREE GAS STREAM HAVING DISTRIBUTED THERETHROUGH A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF SILICON AND OXIDIZABLE, VAPORIZALBE HYDROGEN-FREE SILICON COMPOUNDS, SAID GAS STREAM BEING AT A SUFFICIENTLY HIGH TEMPERATURE TO VAPORIZE SAID SUBSTANCE AND TO OXIDIZE THE SAME UNDER FORMATION OF SILICA AND TO MAINTAIN THE THUS-FORMED SILICA AT AT LEAST ITS FUSING TEMPERATURE; DIRECTING THE THUS-FORMED SILICA-CONTAINING GAS STREAM AGAINST A REFRACTORY SUPPORT SO AS TO IMPINGE THEREON AND TO DEPOSIT SAID SILICA ON THE SAME IN THE FORM OF A BODY OF FUSED, HYDROGEN-FREE, TRAMSPAENT, VITEROUS SILICA.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |