US3558337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fine particles
Assignee: Individual
•
Filing: 1967-12-07
•
Granted: 1971-01-26
•
Expires: 1987-12-07
Abstract
Abstract THE PROCESS FOR THE PRODUCTION OF ACTIVATED SUBMICRON SILICA IN WHICH SILICA IS VAPORISED IN A PLASMA GENERATOR AND SUBJECTED TO A CONTROLLED QUENCH IN THE PRESENCE OF A HYDROGEN CONTAINING COMPOUND TO PRODUCE THIXOTROPICALLY OR HYDROPHOBICALLY ACTIVATED SILICA.
Inventors
- 👤 William Richard Barnes
- 👤 Donald Barby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:44
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/34; C08K3/36; B; B82; B82Y; B82Y30/00; C01; C01B; C01B33/00; C01B33/113; C01B33/12; C01B33/18; C01B33/181; C01P; C01P2004/00; C01P2004/01; C01P2004/03; C01P2004/30; C01P2004/32; C01P2004/60; C01P2004/64; C01P2006/00; C01P2006/11
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |