US3697384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fractionation control system and process with plural feed stream controls
Assignee: Phillips Petroleum Co
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Filing: 1969-05-12
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Granted: 1972-10-10
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Expires: 1989-05-12
Abstract
Abstract METHOD AND APPARATUS FOR CONTROLLING THE FRACTIONAL DISTILLATION OF A FLUID MIXTURE BY SEPARATING THE TOTAL FEED STREAM INTO THE TWO STREAMS, REGULATING THE FLOW RATE OF EACH STREAM, HEATING ONE OF THE STREAMS, DELIVERING EACH STREAM INTO A DISTILLATION COLUMN AT SPACED LOCATIONS, REGULATING THE FLOW OF FLUID FROM THE COLUMN, AND REGULATING THE TEMPERATURE WITHIN THE COLUMN.
Inventors
- 👤 Harry L Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:15
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/42; B01D3/4211; B01D3/425; C; C07; C07C; C07C7/00; C07C7/04; Y; Y10; Y10S; Y10S203/00; Y10S203/09; Y10S203/19
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |