Patent US4159792A successfully refreshed from Google Patents.
Patent US3558438A successfully refreshed from Google Patents.
US3558438A
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Distillation process and apparatus
Assignee: EIDP Inc
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Filing: 1968-10-30
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Granted: 1971-01-26
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Expires: 1988-10-30
Abstract
Abstract A PROCESS FOR SEPARATING A LOWER BOILING FRACTION AS A VAPOR FROM A MIXTURE OF COMPOUNDS BY A NOVEL OPEN TUBE WETTED WALL DISTILLATION PROCESS IN A MULTITUBE STILL, PROVIDED WITH VAPOR RECOMPRESSION OF VAPORIZED REFLUX CONDENSATE TO COMBINE THE HEATING AND COOLING OPERATION, AND AN APPARATUS UTILIZED IN SAID DISTILLATION.
Inventors
- 👤 Leland C Schoenbeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:41
CPC Classifications
B; B01; B01D; B01D1/00; B01D1/06; B01D1/28; Y; Y10; Y10S; Y10S62/00; Y10S62/902; Y10S62/903; Y10S62/918
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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |