US2673195A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clathrate compound formation
Assignee: —
•
Filing: —
•
Granted: 1954-03-23
•
Expires: 1971-03-23
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:18
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/148; C07C7/152; C07C275/00; C07C275/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
IN A PROCESS FOR THE FRACTIONATION OF HYDROCARBON MIXTURES COMPRISING STRAIGHT-CHAIN HYDROCARBONS AND NON-STRAIGHT-CHAIN HYDROCARBONS WHEREIN SAID MIXTURES ARE CONTACTED WITH AN AQUEOUS UREA SOLUTION WHEREBY CRYSTALLINE MOLECULAR COMPLEXES ARE FORMED BETWEEN UREA AND STRAIGHT-CHAIN HYDROCARBONS AND SUBSEQUENTLY ARE SEPARATED FROM THE NON-CRYSTALLINE COMPONENTS, THE IMPROVEMENT WHICH COMPRISES CONDUCTING SAID CONTACTING AND SEPARATION IN THE PRESENCE OF FROM ABOUT 0.1% TO ABOUT 5% BY WEIGHT BASED ON THE HYDROCARBON MIXTURE OF A SURFACE-ACTIVE AGENT OF THE GROUP CONSISTING OF SODIUM SALTS OF ALKYL ARYL SULFONIC ACIDS, SODIUM SALTS OF ALKYLATED SULFO-SUCCINIC ACID AND HIGH MOLECULAR WEIGHT SECONDARY ALCOHOLS.
Claim 2
Dependent Claim
98 words
IN A PROCESS FOR THE FRACTIONATION OF HYDROCARBON MIXTURES COMPRISING STRAIGHT-CHAIN HYDROCARBONS AND NON-STRAIGHT-CHAIN HYDROCARBONS WHEREIN SAID MIXTURES ARE CONTACTED WITH AN AQUEOUS UREA SOLUTION WHEREBY CRYSTALLINE MOLECULAR COMPLEXES ARE FORMED BETWEEN UREA AND STRAIGHT-CHAIN HYDROCARBONS AND SUBSEQUENTLY ARE SEPARATED FROM THE NON-CRYSTALLINE COMPONENTS, THE IMPROVEMENT WHICH COMPRISES CONDUCTING SAID CONTACTING AND SEPARATION IN THE PRESENCE OF FROM ABOUT 0.1% TO ABOUT 5% BY WEIGHT BASED ON THE HYDROCARBON MIXTURE OF A SURFACE-ACTIVE AGENT OF THE GROUP CONSISTING OF SODIUM SALTS OF ALKYL ARYL SULFONIC ACIDS, SODIUM SALTS OF ALKYLATED SULFO-SUCCINIC ACID AND HIGH MOLECULAR WEIGHT SECONDARY ALCOHOLS.
References Cited (Backward Citations)
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US2518677A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-22 | 1957-09-21 | 1958-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-22 | 1961-09-21 | 1962-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-22 | 1965-09-21 | 1966-03-23 | $7700.00 | Window Closed / Lapsed |