Patent US1888028A successfully refreshed from Google Patents.
Patent US3189531A successfully refreshed from Google Patents.
US3189531A
Expired / Lapsed
US
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Distillation column for vacuum and pressure operations
Assignee: Cities Service Oil Co
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Filing: 1962-12-19
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Granted: 1965-06-15
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Expires: 1982-12-19
Abstract
No abstract record available.
Inventors
- 👤 Charles W Hack
- 👤 Rayford G Anthony
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:18
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/10; B01D3/42; B01D3/4211; B01D3/4227
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
A DISTILLATION SYSTEM SUITABLE FOR CONDUCTING BOTH VACUUM AND PRESSURE OPERATIONS COMPRISING: (A) CONCENTRIC DISTILLATION COLUMNS, EACH COLUMN CONTAINING SPACED-APART VAPOR-LIQUID CONTACTING PLATES, THE INNER COLUMN HAVING OPENINGS AT SPACED INTERVALS ON THE PERIPHERY THEREOF, THEREBY ESTABLISHING COMMUNICATION BETWEEN THE INNER AND OUTER COLUMNS; (B) MECHANICAL MEANS FOR REGULATING THE FLOW OF THE LIQUID BEING DISTILLED TO THE INNER AND OUTER DISTILLATION COLUMNS; (C) A REBOILER LOCATED IN THE LOWER PORTION OF THE INNER DISTILLATION COLUMN FOR REBOILING THE LIQUID BEING DISTILLED; (D) MECHANICAL MEANS FOR REMOVING DISTILLATE FROM THE OUTER DISTILLATION COLUMN; (E) MECHANICAL MEANS FOR REMOVING DISTILLATE FROM THE INNER DISTILLATION COLUMN; (F) A CONDENSER SUITABLE FOR CONDENSING DISTILLATE FROM THE INNER AND OUTER DISTILLATION COLUMNS; (G) MECHANICAL MEANS FOR CLOSING OFF THE OPENINGS ON THE PERIPHERY OF THE INNER DISTILLATION COLUMN, THEREBY ISOLATING SAID INNER DISTILLATION COLUMN FROM SAID OUTER DISTILLATION COLUMN, WHEREBY THE SAID OPENINGS MAY BE CLOSED OFF SO THAT THE INNER DISTILLATION COLUMN ALONE IS EMPLOYED DURING PRESSURE DISTILLATIONS AND THE OPENINGS ARE UNCOVERED SO THAT THE
Claim 2
Dependent Claim
173 words
A DISTILLATION SYSTEM SUITABLE FOR CONDUCTING BOTH VACUUM AND PRESSURE OPERATIONS COMPRISING: (A) CONCENTRIC DISTILLATION COLUMNS, EACH COLUMN CONTAINING SPACED-APART VAPOR-LIQUID CONTACTING PLATES, THE INNER COLUMN HAVING OPENINGS AT SPACED INTERVALS ON THE PERIPHERY THEREOF, THEREBY ESTABLISHING COMMUNICATION BETWEEN THE INNER AND OUTER COLUMNS; (B) MECHANICAL MEANS FOR REGULATING THE FLOW OF THE LIQUID BEING DISTILLED TO THE INNER AND OUTER DISTILLATION COLUMNS; (C) A REBOILER LOCATED IN THE LOWER PORTION OF THE INNER DISTILLATION COLUMN FOR REBOILING THE LIQUID BEING DISTILLED; (D) MECHANICAL MEANS FOR REMOVING DISTILLATE FROM THE OUTER DISTILLATION COLUMN; (E) MECHANICAL MEANS FOR REMOVING DISTILLATE FROM THE INNER DISTILLATION COLUMN; (F) A CONDENSER SUITABLE FOR CONDENSING DISTILLATE FROM THE INNER AND OUTER DISTILLATION COLUMNS; (G) MECHANICAL MEANS FOR CLOSING OFF THE OPENINGS ON THE PERIPHERY OF THE INNER DISTILLATION COLUMN, THEREBY ISOLATING SAID INNER DISTILLATION COLUMN FROM SAID OUTER DISTILLATION COLUMN, WHEREBY THE SAID OPENINGS MAY BE CLOSED OFF SO THAT THE INNER DISTILLATION COLUMN ALONE IS EMPLOYED DURING PRESSURE DISTILLATIONS AND THE OPENINGS ARE UNCOVERED SO THAT THE
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) | 1968-06-14 | 1968-12-14 | 1969-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-14 | 1972-12-14 | 1973-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-14 | 1976-12-14 | 1977-06-15 | $7700.00 | Window Closed / Lapsed |