Patent US3064813A successfully refreshed from Google Patents.
US3064813A
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US
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Method and means for filtration of slurries
Assignee: Potash Corp of Saskatchewan Inc
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Filing: 1961-07-18
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Granted: 1962-11-20
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Expires: 1981-07-18
Abstract
No abstract record available.
Inventors
- 👤 Randal E Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:33
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/22; B01D33/00; B01D33/06; B01D33/073; B01D33/44; B01D33/46; B01D33/466; B01D33/58; B01D33/60; B01D35/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2236800A
Cited
US2598606A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-11-19 | 1966-05-21 | 1966-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-19 | 1970-05-21 | 1970-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-19 | 1974-05-21 | 1974-11-20 | $7700.00 | Window Closed / Lapsed |