Patent US2581712A successfully refreshed from Google Patents.
US2581712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of extracting oxygen compounds from hydrocarbon mixture
Assignee: Ruhrchemie AG
•
Filing: 1949-08-08
•
Granted: 1952-01-08
•
Expires: 1969-08-08
Abstract
No abstract record available.
Inventors
- 👤 Rottig Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:54
CPC Classifications
C; C10; C10G; C10G53/00; C10G53/02; C10G53/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A PROCESS FOR THE EXTRACTION OF OXYGENCONTAINING COMPOUNDS FROM REACTION MIXTURES CONTAINING SAID OXYGEN-CONTAINING COMPOUNDS AND HYDROCARBONS WHICH COMPRISES ACTING ON SAID REACTION MIXTURES IN A FIRST STAGE WITH A POLYVALENT ALCOHOL WHICH IS LIQUID UNDER THE CONDITIONS PREVAILING DURING THE PROCESS, THEREAFTER ACTING ON THE PRODUCT OF SAID FIRST STAGE IN A SECOND STAGE WITH A MIXTURE OF POLYVALENT ALCOHOL AND A LOW MOLECULAR WEIGHT MONOVALENT ALCOHOL AND FINALLY TREATING THE PRODUCT OF SAID SECOND STAGE WITH WATER TO REMOVE ANY RESIDUAL POLYVALENT ALCOHOL AND LOW MOLECULAR WEIGHT MONOVALENT ALCOHOL THEREFROM.
Claim 2
Dependent Claim
92 words
A PROCESS FOR THE EXTRACTION OF OXYGENCONTAINING COMPOUNDS FROM REACTION MIXTURES CONTAINING SAID OXYGEN-CONTAINING COMPOUNDS AND HYDROCARBONS WHICH COMPRISES ACTING ON SAID REACTION MIXTURES IN A FIRST STAGE WITH A POLYVALENT ALCOHOL WHICH IS LIQUID UNDER THE CONDITIONS PREVAILING DURING THE PROCESS, THEREAFTER ACTING ON THE PRODUCT OF SAID FIRST STAGE IN A SECOND STAGE WITH A MIXTURE OF POLYVALENT ALCOHOL AND A LOW MOLECULAR WEIGHT MONOVALENT ALCOHOL AND FINALLY TREATING THE PRODUCT OF SAID SECOND STAGE WITH WATER TO REMOVE ANY RESIDUAL POLYVALENT ALCOHOL AND LOW MOLECULAR WEIGHT MONOVALENT ALCOHOL THEREFROM.
References Cited (Backward Citations)
US2470782A
Cited
US2452121A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |