Patent US3482688A successfully refreshed from Google Patents.
US3482688A
Expired / Lapsed
US
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Phosphate flotation process
Assignee: Teck Metals Ltd
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Filing: 1966-07-08
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Granted: 1969-12-09
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Expires: 1986-07-08
Abstract
No abstract record available.
Inventors
- 👤 Charles H G Bushell
- 👤 Horst E Hirsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:51
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/02; B03D1/001; B03D1/004; B03D1/008; B03D1/021; B03D2201/00; B03D2201/02; B03D2203/00; B03D2203/02; B03D2203/04; B03D2203/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA468161A
Cited
US2373688A
Cited
US2442455A
Cited
US3113838A
Cited
US3259242A
Cited
US3361257A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-08 | 1973-06-09 | 1973-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-08 | 1977-06-09 | 1977-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-08 | 1981-06-09 | 1981-12-09 | $7700.00 | Window Closed / Lapsed |