US3549317A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for utilizing fluorosilicic acid
Assignee: Bayer AG
•
Filing: 1968-07-17
•
Granted: 1970-12-22
•
Expires: 1988-07-17
Abstract
No abstract record available.
Inventors
- 👤 Ludwig Dorn
- 👤 Ernst Podschus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:20
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/113; C01B33/12; C01B33/18; C01B33/187; C01B33/193; B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/103; C01B33/186; C01F; C01F11/00; C01F11/20; C01F11/22; C01P; C01P2006/00; C01P2006/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1382165A
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US1634122A
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US2561304A
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US2588853A
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US2601235A
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US2780521A
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US2780523A
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US2881049A
Cited
US3445189A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |