US2912342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of finely divided silicon dioxide
Assignee: New Jersey Zinc Co
•
Filing: 1955-06-27
•
Granted: 1959-11-10
•
Expires: 1975-06-27
Abstract
No abstract record available.
Inventors
- 👤 Luther D Fetterolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:58
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/113; C01B33/12; C01B33/18; C01B33/181; C01B33/183; C01P; C01P2004/00; C01P2004/01; C01P2004/03; C01P2004/60; C01P2004/61; C01P2004/62; C01P2006/00; C01P2006/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
THE METHOD OF PRODUCING FINELY-DIVIDED SILICON DIOXIDE WHICH COMPRISES REACTING SILICA SAND WITH CARBON AND A SULFUR-CONTAINING MATERIAL AT A TEMPERATURE SUFFICIENTLY HIGH TO PRODUCE A GASEOUS MIXTURE OF SILICON SULFIDE VAPOR AND CARBON MONOXIDE, INTRODUCING THE GASEOUS MIXTURE INTO A COMBUSTION ZONE AT A TEMPERATURE SUFFICIENT HIGH TO MAINTAIN THE SILICON SULFIDE IN THE VAPOR STATE IN THE PRESENCE OF THE CARBON MONOXIDEM SUPPLYING THE COMBUSTION ZONE WITH AIR IN AMOUNT AT LEAST SUFFICIENT TO SUPPORT COMBUSTION OF THE GASEOUS MIXTURE OF THE SILICON SULFIDE VAPOR AND THE CARBON MONOXIDE, RAPIDLY COOLING THE RESULTING PRODUCTS OF COMBUSTION, AND COLLECTING THE RESULTING FINELY-DIVIDED PARTICLES OF SILICON DIOXIDE.
Claim 2
Independent Claim
107 words
THE METHOD OF PRODUCING FINELY-DIVIDED SILICON DIOXIDE WHICH COMPRISES REACTING SILICA SAND WITH CARBON AND A SULFUR-CONTAINING MATERIAL AT A TEMPERATURE SUFFICIENTLY HIGH TO PRODUCE A GASEOUS MIXTURE OF SILICON SULFIDE VAPOR AND CARBON MONOXIDE, INTRODUCING THE GASEOUS MIXTURE INTO A COMBUSTION ZONE AT A TEMPERATURE SUFFICIENT HIGH TO MAINTAIN THE SILICON SULFIDE IN THE VAPOR STATE IN THE PRESENCE OF THE CARBON MONOXIDEM SUPPLYING THE COMBUSTION ZONE WITH AIR IN AMOUNT AT LEAST SUFFICIENT TO SUPPORT COMBUSTION OF THE GASEOUS MIXTURE OF THE SILICON SULFIDE VAPOR AND THE CARBON MONOXIDE, RAPIDLY COOLING THE RESULTING PRODUCTS OF COMBUSTION, AND COLLECTING THE RESULTING FINELY-DIVIDED PARTICLES OF SILICON DIOXIDE.
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) | 1962-11-09 | 1963-05-11 | 1963-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-09 | 1967-05-11 | 1967-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-09 | 1971-05-11 | 1971-11-10 | $7700.00 | Window Closed / Lapsed |