US3437441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing highly porous and reactive silica materials
Assignee: JM Huber Corp
•
Filing: 1967-03-15
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Granted: 1969-04-08
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Expires: 1987-03-15
Abstract
No abstract record available.
Inventors
- 👤 Robert K Mays
- 👤 Orlando Leonard Bertorelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:15
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/40; C09C1/42; A; A01; A01N; A01N25/00; A01N25/08; B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/103; C01; C01B; C01B33/00; C01B33/113; C08; C08K; C08K3/00; C08K3/34; C08K3/36; C01P; C01P2004/00; C01P2004/01; C01P2004/03; C01P2004/54; C01P2004/60; C01P2004/61; C01P2004/62; C01P2006/00; C01P2006/12; C01P2006/14; C01P2006/16; C01P2006/19; C01P2006/60; C01P2006/64; C01P2006/80; C01P2006/82
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3328125A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |