US2709641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extraction column
Assignee: Universal Oil Products Co
•
Filing: 1951-11-08
•
Granted: 1955-05-31
•
Expires: 1971-11-08
Abstract
No abstract record available.
Inventors
- 👤 Clarence G Gerhold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:08
CPC Classifications
B; B01; B01D; B01D11/00; B01D11/04; B01D11/0426; B01D11/043
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
IN A COUNTERCURRENT EXTRACTION COLUMN, THE COMBINATION OF A PAIR OF VERTICALLY SPACED TRAYS EXTENDING ACROSS THE COLUMN, MEANS FOR COLLECTING A POOL OF LIQUID ON THE UPPER TRAY, AN ORIFICE IN THE BOTTOM OF THE LOWER TRAY, AN OPEN-ENDED TUBULAR RISER EXTENDING UPWARDLY FROM SAID ORIFICE AND TERMINATING A SUBSTANTIAL DISTANCE BELOW SAID UPPER TRAY, AN ANNULAR LIQUID DISTRIBUTING CONDUIT DISPOSED ABOVE SAID RISER AND BELOW SAID UPPER TRAY, UPWARDLY DIRECTED SPRAY NOZZLES SPACED HORIZONTALLY AROUND SAID ANNULAR CONDUIT, AND MEANS FOR SUPPLYING LIQUID FROM SAID UPPER TRAY TO SAID CONDUIT AND NOZZLES.
Claim 2
Dependent Claim
94 words
IN A COUNTERCURRENT EXTRACTION COLUMN, THE COMBINATION OF A PAIR OF VERTICALLY SPACED TRAYS EXTENDING ACROSS THE COLUMN, MEANS FOR COLLECTING A POOL OF LIQUID ON THE UPPER TRAY, AN ORIFICE IN THE BOTTOM OF THE LOWER TRAY, AN OPEN-ENDED TUBULAR RISER EXTENDING UPWARDLY FROM SAID ORIFICE AND TERMINATING A SUBSTANTIAL DISTANCE BELOW SAID UPPER TRAY, AN ANNULAR LIQUID DISTRIBUTING CONDUIT DISPOSED ABOVE SAID RISER AND BELOW SAID UPPER TRAY, UPWARDLY DIRECTED SPRAY NOZZLES SPACED HORIZONTALLY AROUND SAID ANNULAR CONDUIT, AND MEANS FOR SUPPLYING LIQUID FROM SAID UPPER TRAY TO SAID CONDUIT AND NOZZLES.
References Cited (Backward Citations)
US2091645A
Cited
US2009347A
Cited
US2082034A
Cited
US2191919A
Cited
US2228434A
Cited
US2361780A
Cited
US2458170A
Cited
US2451433A
Cited
US2623813A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-30 | 1958-11-29 | 1959-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-30 | 1962-11-29 | 1963-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-30 | 1966-11-29 | 1967-05-31 | $7700.00 | Window Closed / Lapsed |