US2800411A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystal purification apparatus and process
Assignee: Phillips Petroleum Co
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Filing: 1954-03-31
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Granted: 1957-07-23
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Expires: 1974-03-31
Abstract
No abstract record available.
Inventors
- 👤 Church J Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:22
CPC Classifications
B; B01; B01D; B01D9/00; B01D9/0004; B01D9/0013; B01D9/004
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
APPARATUS OF THE CLASS DESCRIBED COMPRISING A CYLINDRICAL VESSEL HAVING AN OPENING ADJACENT ONE END FOR WITHDRAWING LIQUID AND AN OPENING IN THE OPPOSITE END FOR INTRODUCING DISCRETE CRYSTALS TO BE PURIFIED; AN AXIAL SHAFT IN SAID VESSEL HAVING AT LEAST ONE SET OF HALLOW RADIAL FILTER ARMS FIXED THERETO INTERMEDIATE THE ENDS OF SAID VESSEL, SAID SHAFT BEING HOLLOW AT LEAST FROM SAID FILTER TO ONE END SO AS TO PROVIDE A FLOW PATH FOR FILTRATE THROUGH SAID FILTER ARMS AND SHAFT TO A RECEIVER OUTSIDE OF SAID VESSEL.
Claim 2
Dependent Claim
90 words
APPARATUS OF THE CLASS DESCRIBED COMPRISING A CYLINDRICAL VESSEL HAVING AN OPENING ADJACENT ONE END FOR WITHDRAWING LIQUID AND AN OPENING IN THE OPPOSITE END FOR INTRODUCING DISCRETE CRYSTALS TO BE PURIFIED; AN AXIAL SHAFT IN SAID VESSEL HAVING AT LEAST ONE SET OF HALLOW RADIAL FILTER ARMS FIXED THERETO INTERMEDIATE THE ENDS OF SAID VESSEL, SAID SHAFT BEING HOLLOW AT LEAST FROM SAID FILTER TO ONE END SO AS TO PROVIDE A FLOW PATH FOR FILTRATE THROUGH SAID FILTER ARMS AND SHAFT TO A RECEIVER OUTSIDE OF SAID VESSEL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-22 | 1961-01-21 | 1961-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-22 | 1965-01-21 | 1965-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-22 | 1969-01-21 | 1969-07-23 | $7700.00 | Window Closed / Lapsed |