Patent US3430762A successfully refreshed from Google Patents.
US3430762A
Expired / Lapsed
US
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Simultaneous flotation of silica phosphates and carbonate minerals
Assignee: Individual
•
Filing: 1967-01-19
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Granted: 1969-03-04
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Expires: 1987-01-19
Abstract
No abstract record available.
Inventors
- 👤 David Weston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:53
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/02; B03D1/06; B03D1/001; B03D1/002; B03D1/004; B03D1/008; B03D2201/00; B03D2201/005; B03D2201/02; B03D2203/00; B03D2203/02; B03D2203/04; B03D2203/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2419945A
Cited
US2525146A
Cited
US2551893A
Cited
US2701057A
Cited
US2875896A
Cited
FR1273177A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-03 | 1972-09-02 | 1973-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-03 | 1976-09-02 | 1977-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-03 | 1980-09-02 | 1981-03-04 | $7700.00 | Window Closed / Lapsed |