US2715060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making silica
Assignee: Dow Silicones Corp
•
Filing: 1951-10-31
•
Granted: 1955-08-09
•
Expires: 1971-10-31
Abstract
No abstract record available.
Inventors
- 👤 Arthur J Barry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:21
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/113; C01B33/12; C01B33/18; C01B33/181; C01B33/183; C01P; C01P2004/00; C01P2004/60; C01P2004/62; C01P2006/00; C01P2006/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1451399A
Cited
US2269059A
Cited
GB572230A
Cited
GB575696A
Cited
GB633732A
Cited
GB635645A
Cited
US2535036A
Cited
US2556462A
Cited
US2474704A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-08-08 | 1959-02-07 | 1959-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-08 | 1963-02-07 | 1963-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-08 | 1967-02-07 | 1967-08-09 | $7700.00 | Window Closed / Lapsed |