Patent US2653147A successfully refreshed from Google Patents.
US2653147A
Expired / Lapsed
US
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Separation process
Assignee: —
•
Filing: —
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Granted: 1953-09-22
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Expires: 1970-09-22
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:42
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/148; C07C7/152; C07C13/00; C07C13/02; C07C13/16; C07C13/18; C07C29/00; C07C29/48; C07C29/50; C07C335/00; C07C335/02; C07C35/00; C07C35/02; C07C35/08; C07C45/00; C07C45/27; C07C45/32; C07C45/33; C07C45/78; C07C45/80; C07C45/85; C07C49/00; C07C49/385; C07C49/403; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
THE METHOD FOR RESOLVING MIXTURES OF NAPHTHENIC HYDROCARBONS AND OXYGENATED DERIVATIVES OF NAPHTHENIC HYDROCARBONS WHICH COMPRISES CONTACTING SAID MIXTURE WITH THIOUREA IN THE PRESENCE OF AN ADDITION REACTION ACTIVATOR SELECTED FROM THE GROUP CONSISTING OF (A) LOWBOILING OXYGENATED HYDROCARBON DERIVATIVES: (B) NITROGEN-CONTAINING ACTIVATORS; AND (C) WATER IN AMOUNT SUCH THAT AN AQUEOUS THIOUREA SOLUTION CONTAINING FROM 60 TO 95 PER CENT OF THE THIOUREA REQUIRED FOR SATURATION IS EMPLOYED, AND SEPARATING SOLID ADDITION PRODUCTS OF SAID NAPHTHENIC
Claim 2
Independent Claim
77 words
THE METHOD FOR RESOLVING MIXTURES OF NAPHTHENIC HYDROCARBONS AND OXYGENATED DERIVATIVES OF NAPHTHENIC HYDROCARBONS WHICH COMPRISES CONTACTING SAID MIXTURE WITH THIOUREA IN THE PRESENCE OF AN ADDITION REACTION ACTIVATOR SELECTED FROM THE GROUP CONSISTING OF (A) LOWBOILING OXYGENATED HYDROCARBON DERIVATIVES: (B) NITROGEN-CONTAINING ACTIVATORS; AND (C) WATER IN AMOUNT SUCH THAT AN AQUEOUS THIOUREA SOLUTION CONTAINING FROM 60 TO 95 PER CENT OF THE THIOUREA REQUIRED FOR SATURATION IS EMPLOYED, AND SEPARATING SOLID ADDITION PRODUCTS OF SAID NAPHTHENIC
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) | 1956-09-21 | 1957-03-23 | 1957-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-21 | 1961-03-23 | 1961-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-21 | 1965-03-23 | 1965-09-22 | $7700.00 | Window Closed / Lapsed |