Patent US2681337A successfully refreshed from Google Patents.
US2681337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gorin
Assignee: —
•
Filing: —
•
Granted: 1954-06-15
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Expires: 1971-06-15
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:55
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/148; C07C7/152; C07B; C07B63/00; C07C275/00; C07C275/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
IN A PROCESS FOR THE SEPARATION OF STRAIGHT CHAIN HYDROCARBONS FROM THEIR MIXTURE WITH NONSTRAIGHT-CHAIN HYDROCARBONS, WHICH COMPRISES CONTACTING THE MIXTURE WITH AN AQUEOUS SOLUTION OF UREA SO AS TO FORM CRYSTALLINE MOLECULAR COMPLEXES OF UREA WITH STRAIGHT-CHAIN HYDROCABONS AND SEPARATING THE COMPLEX FROM NON-STRAIGTCHAIN HYDROCARBONS, THE IMPROVEMENT WHICH COMPRISES SO CONTACTING THE SAID MIXTURE AND THE SAID AQUEOUS SOLUTION IN THE PRESENCE OF TRIETHYLAMINE.
Claim 2
Dependent Claim
65 words
IN A PROCESS FOR THE SEPARATION OF STRAIGHT CHAIN HYDROCARBONS FROM THEIR MIXTURE WITH NONSTRAIGHT-CHAIN HYDROCARBONS, WHICH COMPRISES CONTACTING THE MIXTURE WITH AN AQUEOUS SOLUTION OF UREA SO AS TO FORM CRYSTALLINE MOLECULAR COMPLEXES OF UREA WITH STRAIGHT-CHAIN HYDROCABONS AND SEPARATING THE COMPLEX FROM NON-STRAIGTCHAIN HYDROCARBONS, THE IMPROVEMENT WHICH COMPRISES SO CONTACTING THE SAID MIXTURE AND THE SAID AQUEOUS SOLUTION IN THE PRESENCE OF TRIETHYLAMINE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-14 | 1957-12-14 | 1958-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-14 | 1961-12-14 | 1962-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-14 | 1965-12-14 | 1966-06-15 | $7700.00 | Window Closed / Lapsed |