US2981773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation by crystallization
Assignee: Phillips Petroleum Co
•
Filing: 1954-03-01
•
Granted: 1961-04-25
•
Expires: 1974-03-01
Abstract
No abstract record available.
Inventors
- 👤 John A Weedman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:24
CPC Classifications
B; B01; B01D; B01D9/00; B01D9/0004; B01D9/0013; B01D9/004; B01D9/0063; Y; Y10; Y10S; Y10S585/00; Y10S585/949; Y10S585/956
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
A PROCESS FOR THE SEPARATION OF ONE COMPONENT FROM A LIQUID SOLUTION WHICH COMPRISES SUPPLYING SAID LIQUID SOLUTION TO A CONTAINER AT A PREDETERMINED RATE, PASSING SAID LIQUID SOLUTION TO A COOLING ZONE SO AS TO CONVERT A PORTION OF SAID SOLUTION TO CRYSTALS, PASSING A RESULTING MIXTURE OF SAID CRYSTALS AND UNCRYSTALLIZED LIQUID INTO THE INLET END PORTION OF AN ELONGATED CONFINED DISPLACEMENT ZONE, COMPRESSING SAID CRYSTALS INTO A COMPACT MASS IN SAID DISPLACEMENT ZONE AND FORCING SAID COMPACT MASS OF CRYSTALS THROUGH SAID DISPLACEMENT ZONE TOWARD A MELTING ZONE, WITHDRAWING LIQUID FROM SAID INLET END PORTION OF SAID DISPLACEMENT ZONE, SUPPLYING HEAT TO SAID MELT ZONE IN ACCORDANCE WITH THE LEVEL OF LIQUID IN SAID CONTAINER SO AS TO SUPPLY A GREATER AMOUNT OF HEAT AND THUS OBTAIN MORE MELTING AS THE LIQUID LEVEL INCREASES IN SAID CONTAINER AND A LESSER AMOUNT OF HEAT SO AS TO OBTAIN LESS MELTING AS THE LIQUID LEVEL DECREASES IN SAID CONTAINER, FORC-
Claim 2
Dependent Claim
161 words
A PROCESS FOR THE SEPARATION OF ONE COMPONENT FROM A LIQUID SOLUTION WHICH COMPRISES SUPPLYING SAID LIQUID SOLUTION TO A CONTAINER AT A PREDETERMINED RATE, PASSING SAID LIQUID SOLUTION TO A COOLING ZONE SO AS TO CONVERT A PORTION OF SAID SOLUTION TO CRYSTALS, PASSING A RESULTING MIXTURE OF SAID CRYSTALS AND UNCRYSTALLIZED LIQUID INTO THE INLET END PORTION OF AN ELONGATED CONFINED DISPLACEMENT ZONE, COMPRESSING SAID CRYSTALS INTO A COMPACT MASS IN SAID DISPLACEMENT ZONE AND FORCING SAID COMPACT MASS OF CRYSTALS THROUGH SAID DISPLACEMENT ZONE TOWARD A MELTING ZONE, WITHDRAWING LIQUID FROM SAID INLET END PORTION OF SAID DISPLACEMENT ZONE, SUPPLYING HEAT TO SAID MELT ZONE IN ACCORDANCE WITH THE LEVEL OF LIQUID IN SAID CONTAINER SO AS TO SUPPLY A GREATER AMOUNT OF HEAT AND THUS OBTAIN MORE MELTING AS THE LIQUID LEVEL INCREASES IN SAID CONTAINER AND A LESSER AMOUNT OF HEAT SO AS TO OBTAIN LESS MELTING AS THE LIQUID LEVEL DECREASES IN SAID CONTAINER, FORC-
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) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |