Patent US2365525A successfully refreshed from Google Patents.
Patent US2518677A successfully refreshed from Google Patents.
US2518677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of hydrocarbons using
Assignee: —
•
Filing: —
•
Granted: 1950-08-15
•
Expires: 1967-08-15
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:56
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/148; C07C7/152; B; B01; B01D; B01D17/00; B01D17/02; B01D17/04; B01D17/047; C07C275/00; C07C275/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
96 words
IN A PROCESS FOR THE SEPARATION OF STRAIGHT CHAIN HYDROCARBONS FROM THEIR FLUID MIXTURE WITH NON-STRAIGHT CHAIN HYDROCARBONS, WHEREIN AN AQUEOUS UREA SOLUTION AND SAID MISTURE ARE CONTACTED TO SELECTIVELY FORM CRYSTALLINE MOLECULAR COMPLEXES OF UREA WITH STRAIGHT CHAIN HYDROCARBONS, THE IMPROVEMENT WHICH COMPRISES ADDING THERETO FROM 0.04 TO 1.0 GRAM PER LITER OF THE UREA SOLUTION OF A WATER-SOLUBLE WETTING AGENT AND FROM 10 TO 60 GRAMS PER LITER OF A SUBSTANTIALLY NEUTRAL WATER-SOLUBLE ELECTROLYTE, SAID WETTING AGENT AND ELECTROLYTE PROMOTING ASSOCIATION OF THE COMPLEX CRYSTALS WITH THE AQUEOUS SOLUTION AND AIDING IN DEPRESSING EMULSIFICATION.
References Cited (Backward Citations)
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Cited
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Cited
US2338384A
Cited
US2411105A
Cited
US2383768A
Cited
US2442820A
Cited
US2428067A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-14 | 1954-02-13 | 1954-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-14 | 1958-02-13 | 1958-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-14 | 1962-02-13 | 1962-08-15 | $7700.00 | Window Closed / Lapsed |