US2501880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvent extraction apparatus and process
Assignee: IOWA STATE COLLEGE RES FOUND
•
Filing: 1946-08-30
•
Granted: 1950-03-28
•
Expires: 1966-08-30
Abstract
No abstract record available.
Inventors
- 👤 Orland R Sweeney
- 👤 Lionel K Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:29
CPC Classifications
C; C11; C11B; C11B1/00; C11B1/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
IN A PROCESS IN WHICH SOLVENT AND OIL IS WITHDRAWN THROUGH A SCREEN FROM AN EXTRACTION ZONE AND SOLVENT EVAPORATED, THE STEPS OF PROVIDING AN ELONGATED VERTICAL VAPORIZING ZONE, PROVIDING A LIQUID COLUMN OF SOLVENT AND OIL BETWEEN SAID VAPORIZING ZONE AND SAID SCREEN, VAPORIZING SOLVENT IN SAID ZONE TO CARRY SLUGS OF OIL UPWARDLY THROUGH THE VAPORIZING ZONE AND TO CREATE PRESSURE IMPULSES AGAINST SAID LIQUID COLUMN TO FORCE SAID LIQUID OVER SAID SCREEN TO CLEAR THE SAME, AND SEPARATING THE LIQUID AND VAPORS DISCHARGED FROM SAID VAPORIZING ZONE.
Claim 2
Dependent Claim
90 words
IN A PROCESS IN WHICH SOLVENT AND OIL IS WITHDRAWN THROUGH A SCREEN FROM AN EXTRACTION ZONE AND SOLVENT EVAPORATED, THE STEPS OF PROVIDING AN ELONGATED VERTICAL VAPORIZING ZONE, PROVIDING A LIQUID COLUMN OF SOLVENT AND OIL BETWEEN SAID VAPORIZING ZONE AND SAID SCREEN, VAPORIZING SOLVENT IN SAID ZONE TO CARRY SLUGS OF OIL UPWARDLY THROUGH THE VAPORIZING ZONE AND TO CREATE PRESSURE IMPULSES AGAINST SAID LIQUID COLUMN TO FORCE SAID LIQUID OVER SAID SCREEN TO CLEAR THE SAME, AND SEPARATING THE LIQUID AND VAPORS DISCHARGED FROM SAID VAPORIZING ZONE.
References Cited (Backward Citations)
US882322A
Cited
US1005733A
Cited
US1831121A
Cited
US2273557A
Cited
US2377135A
Cited
US2447845A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-27 | 1953-09-26 | 1954-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-27 | 1957-09-26 | 1958-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-27 | 1961-09-26 | 1962-03-28 | $7700.00 | Window Closed / Lapsed |