US2931433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Evaporation process control by variation in process material dielectric constant
Assignee: Phillips Petroleum Co
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Filing: 1955-12-27
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Granted: 1960-04-05
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Expires: 1975-12-27
Abstract
No abstract record available.
Inventors
- 👤 Clyde W Mertz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:38
CPC Classifications
B; B01; B01D; B01D1/00; B01D1/0082
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
THE PROCESS OF CONCENTRATING A RELATIVELY DILUTE LIQUID SOLUTION, OF A LESS VOLATILE MATERIAL IN A MORE VOLATILE LIQUID SOLVENT HAVING A DIELECTRIC CONSTANT MEASURABLY DIFFERENT FROM SAID MATERIAL, TO FORM A PRODUCT OF A PREDETERMINED PERCENTAGE CONCENTRATION, COMPRISING ADDING SAID DILUTE SOLUTION TO AN EVAPORATING ZONE, EVAPORATING SAID SOLVENT FROM SAID SOLUTION IN SAID EVAPORATING ZONE AND REMOVING SAID EVAORATED SOLVENT FROM SAID ZONE TO LEAVE BEHIND A CONCENTRATED SOLUTION OF SAID PREDETERMINED CONCENTTRATION, WITHDRAWING SAID CONCENTRATED SOLUTION FROM SAID EVAPORATING ZONE, HEATING SAID WITHDRAWN CONCENTRATED SOLUTION, RECYCLING A FIRST PORTION OF THE SAME TO SAID EVAPORATING ZONE, REMOVING THE REMAINING SECOND PORTION OF SAID WITHDRAWN CONCENTRATED SOLUTION AS SAID PRODUCT, AND MAINTAINING A CONSTANT LIQUID LEVEL IN SAID ZONE, IN WHICH PROCESS THE RATE OF ADDITION OF DILUTE SOLUTION, RATE OF RECYCLE OF CONCENTRATED SOLUTION, TEMPERATURE OF RECYCLED SOLUTION, AND RATE OF REMOVAL OF PRODUCT, ARE OPERATIVE VARIABLES, MEASURING A FUNCTION OF THE DI-
Claim 2
Dependent Claim
156 words
THE PROCESS OF CONCENTRATING A RELATIVELY DILUTE LIQUID SOLUTION, OF A LESS VOLATILE MATERIAL IN A MORE VOLATILE LIQUID SOLVENT HAVING A DIELECTRIC CONSTANT MEASURABLY DIFFERENT FROM SAID MATERIAL, TO FORM A PRODUCT OF A PREDETERMINED PERCENTAGE CONCENTRATION, COMPRISING ADDING SAID DILUTE SOLUTION TO AN EVAPORATING ZONE, EVAPORATING SAID SOLVENT FROM SAID SOLUTION IN SAID EVAPORATING ZONE AND REMOVING SAID EVAORATED SOLVENT FROM SAID ZONE TO LEAVE BEHIND A CONCENTRATED SOLUTION OF SAID PREDETERMINED CONCENTTRATION, WITHDRAWING SAID CONCENTRATED SOLUTION FROM SAID EVAPORATING ZONE, HEATING SAID WITHDRAWN CONCENTRATED SOLUTION, RECYCLING A FIRST PORTION OF THE SAME TO SAID EVAPORATING ZONE, REMOVING THE REMAINING SECOND PORTION OF SAID WITHDRAWN CONCENTRATED SOLUTION AS SAID PRODUCT, AND MAINTAINING A CONSTANT LIQUID LEVEL IN SAID ZONE, IN WHICH PROCESS THE RATE OF ADDITION OF DILUTE SOLUTION, RATE OF RECYCLE OF CONCENTRATED SOLUTION, TEMPERATURE OF RECYCLED SOLUTION, AND RATE OF REMOVAL OF PRODUCT, ARE OPERATIVE VARIABLES, MEASURING A FUNCTION OF THE DI-
References Cited (Backward Citations)
US1734699A
Cited
US1951035A
Cited
US1883211A
Cited
US2135512A
Cited
US2135513A
Cited
US2221000A
Cited
US2304150A
Cited
US2576253A
Cited
US2599583A
Cited
US2540146A
Cited
GB682254A
Cited
US2777514A
Cited
US2663308A
Cited
US2650660A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-05 | 1963-10-05 | 1964-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-05 | 1967-10-05 | 1968-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-05 | 1971-10-05 | 1972-04-05 | $7700.00 | Window Closed / Lapsed |