US2770533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystal purification apparatus control
Assignee: Phillips Petroleum Co
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Filing: 1952-12-01
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Granted: 1956-11-13
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Expires: 1972-12-01
Abstract
No abstract record available.
Inventors
- 👤 Anthony R Kahmann
- 👤 Tom E Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:10
CPC Classifications
B; B01; B01D; B01D9/00; B01D9/004; B01D9/0063
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
IN AN APPARATUS FOR THE SEPARATION AND PURIFICATION OF CRYSTALS COMPRISING AN ELONGATED, CLOSED VESSEL HAVING A HEATER DISPOSED IN THE DOWNSTREAM PORTION OF SAID VESSEL WITH RESPECT TO THE FLOW OF CRYSTALS, PERFORATE, RECIPROCABLE PISTON DISPOSED IN THE UPSTREAM PORTION OF SAID VESSEL ADAPTED TO PRODUCE A LONGITUDINAL COMPRESSION STROKE, AN OUTLET OPENING IN THE UPSTREAM PORTION AND AN OUTLET OPENING IN THE DOWNSTREAM PORTION THE IMPROVEMENT COMPRISING A CRYSTAL FEED INLET POSITIONED SO AS TO INTRODUCE FEED DOWNSTREAM FROM THE DOWNSTREAM FACE OF THE PISTON WITH RESPECT TO THE FLOW OF CRYSTALS; MEANS FOR SUPPLYING A SLURRY OF CRYSTALS AND MOTHER LIQUOR
Claim 2
Dependent Claim
104 words
IN AN APPARATUS FOR THE SEPARATION AND PURIFICATION OF CRYSTALS COMPRISING AN ELONGATED, CLOSED VESSEL HAVING A HEATER DISPOSED IN THE DOWNSTREAM PORTION OF SAID VESSEL WITH RESPECT TO THE FLOW OF CRYSTALS, PERFORATE, RECIPROCABLE PISTON DISPOSED IN THE UPSTREAM PORTION OF SAID VESSEL ADAPTED TO PRODUCE A LONGITUDINAL COMPRESSION STROKE, AN OUTLET OPENING IN THE UPSTREAM PORTION AND AN OUTLET OPENING IN THE DOWNSTREAM PORTION THE IMPROVEMENT COMPRISING A CRYSTAL FEED INLET POSITIONED SO AS TO INTRODUCE FEED DOWNSTREAM FROM THE DOWNSTREAM FACE OF THE PISTON WITH RESPECT TO THE FLOW OF CRYSTALS; MEANS FOR SUPPLYING A SLURRY OF CRYSTALS AND MOTHER LIQUOR
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) | 1959-11-13 | 1960-05-14 | 1960-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-13 | 1964-05-14 | 1964-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-13 | 1968-05-14 | 1968-11-13 | $7700.00 | Window Closed / Lapsed |