US3498746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of fluosilicic acid and p2o5 from recycle streams and pond water
Assignee: United States Steel Corp
•
Filing: 1967-11-29
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Granted: 1970-03-03
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Expires: 1987-11-29
Abstract
No abstract record available.
Inventors
- 👤 Roy G Smaltz
- 👤 William A Satterwhite
- 👤 Paul R Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:21
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/08; C01B33/10; C01B33/103; C01B25/00; C01B25/16; C01B25/18; C01B25/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3273713A
Cited
US1938533A
Cited
US2636806A
Cited
US2962357A
Cited
US3151941A
Cited
US3091513A
Cited
US3256061A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-02 | 1973-09-01 | 1974-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-02 | 1977-09-01 | 1978-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-02 | 1981-09-01 | 1982-03-03 | $7700.00 | Window Closed / Lapsed |