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Patent US3454159A successfully refreshed from Google Patents.
US3454159A
Expired / Lapsed
US
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Phosphate flotation
Assignee: Hexion Inc
•
Filing: 1966-04-21
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Granted: 1969-07-08
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Expires: 1986-04-21
Abstract
No abstract record available.
Inventors
- 👤 Clinton A Hollingsworth
- 👤 Bobby L Sapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:22
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/02; B03D1/021; Y; Y10; Y10S; Y10S209/00; Y10S209/902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2313360A
Cited
US2336437A
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US2424552A
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US2660303A
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US3302785A
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US3349903A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-07 | 1973-01-06 | 1973-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-07 | 1977-01-06 | 1977-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-07 | 1981-01-06 | 1981-07-08 | $7700.00 | Window Closed / Lapsed |