US2768087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicon carbide aggregates
Assignee: Monsanto Chemicals Ltd
•
Filing: 1953-05-18
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Granted: 1956-10-23
•
Expires: 1973-05-18
Abstract
No abstract record available.
Inventors
- 👤 Bird Philip Lorraine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:13
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/56; C04B35/565
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A PROCESS FOR THE PRODUCTION OF SILICON CARBIDE AGGREGATES COMPRISING ADMIXING FROM 30 TO 96% COMMINUTES SILICON CARBIDE, FROM 1.5 TO 15% OF SILICA AS AQUEOUS SILICA SOL, AND AT LEAST 2.5% OF A FINELY DIVIDED CERAMIC RAW MATERIAL CAPABLE OF REACTING WITH THE SILICA TO FORM A CERAMIC MATRIX FOR THE SILICON CARBIDE; AND DRYING AND FIRING THE MIXTURE IN ORDER TO OBTAIN AN AGGREGATE IN WHICH THE SILICON CARBIDE PARTICLES ARE HELD IN SAID MATRIX.
Claim 2
Dependent Claim
77 words
A PROCESS FOR THE PRODUCTION OF SILICON CARBIDE AGGREGATES COMPRISING ADMIXING FROM 30 TO 96% COMMINUTES SILICON CARBIDE, FROM 1.5 TO 15% OF SILICA AS AQUEOUS SILICA SOL, AND AT LEAST 2.5% OF A FINELY DIVIDED CERAMIC RAW MATERIAL CAPABLE OF REACTING WITH THE SILICA TO FORM A CERAMIC MATRIX FOR THE SILICON CARBIDE; AND DRYING AND FIRING THE MIXTURE IN ORDER TO OBTAIN AN AGGREGATE IN WHICH THE SILICON CARBIDE PARTICLES ARE HELD IN SAID MATRIX.
References Cited (Backward Citations)
US2013625A
Cited
US2205308A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |