US2664391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous distillation of heat sensitive compounds
Assignee: Dow Chemical Co
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Filing: 1952-03-28
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Granted: 1953-12-29
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Expires: 1972-03-28
Abstract
No abstract record available.
Inventors
- 👤 Kenneth E Coulter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:28
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14; Y; Y10; Y10S; Y10S203/00; Y10S203/11; Y10S203/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A PROCESS OF CONTINUOUS DISTILLATION WHICH COMPRISES THE STEPS OF FEEDING A HEAT-SENSITIVE DISTILLABLE MATERIAL TO A DISTILLATION COLUM, HEATING SAID DISTILLABLE MATERIAL TO FORM A VAPOR PHASE, SEPARATING SAID VAPOR PHASE FROM THE LIQUID PHASE, WITHDRAWING THE LIQUID FROM THE BOTTOM OF SIAD COLUMN, REHEATING PART OF SAID WITHDRAWN LIQUID IN A REBOILER TO CAUSE VAPORIZATION OF A PORTION THEREOF AND RETURNING THE VAPOR TO SAID COLUMN, HOLDING PART OF SAID WITHDRAWN LIQUID IN A VESSEL IN FREE COMMUNICATION WITH, AND AT A LEVEL APPROXIMATELY THE SAME AS THE NORMAL LEVEL OF, LIQUID IN SAID REBOILER AND MAINTAINING THE LIQUID IN SAID VESSEL AT A TEMPERTURE LOWER THAN THE TEMPERATURE OF THE LIQUID IN THE REBOILER.
Claim 2
Dependent Claim
117 words
A PROCESS OF CONTINUOUS DISTILLATION WHICH COMPRISES THE STEPS OF FEEDING A HEAT-SENSITIVE DISTILLABLE MATERIAL TO A DISTILLATION COLUM, HEATING SAID DISTILLABLE MATERIAL TO FORM A VAPOR PHASE, SEPARATING SAID VAPOR PHASE FROM THE LIQUID PHASE, WITHDRAWING THE LIQUID FROM THE BOTTOM OF SIAD COLUMN, REHEATING PART OF SAID WITHDRAWN LIQUID IN A REBOILER TO CAUSE VAPORIZATION OF A PORTION THEREOF AND RETURNING THE VAPOR TO SAID COLUMN, HOLDING PART OF SAID WITHDRAWN LIQUID IN A VESSEL IN FREE COMMUNICATION WITH, AND AT A LEVEL APPROXIMATELY THE SAME AS THE NORMAL LEVEL OF, LIQUID IN SAID REBOILER AND MAINTAINING THE LIQUID IN SAID VESSEL AT A TEMPERTURE LOWER THAN THE TEMPERATURE OF THE LIQUID IN THE REBOILER.
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) | 1956-12-28 | 1957-06-29 | 1957-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-28 | 1961-06-29 | 1961-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-28 | 1965-06-29 | 1965-12-29 | $7700.00 | Window Closed / Lapsed |