Patent US1462704A successfully refreshed from Google Patents.
Patent US3259664A successfully refreshed from Google Patents.
US3259664A
Expired / Lapsed
US
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Solvent extraction of halo-paraffins from paraffins
Assignee: Phillips Petroleum Co
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Filing: 1963-08-21
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Granted: 1966-07-05
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Expires: 1983-08-21
Abstract
No abstract record available.
Inventors
- 👤 Gardner C Ray
- 👤 Van C Vives
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:58
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/38; C07C7/00; C07C7/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
A PROCESS FOR SEPARATING A MIXTURE OF COMPOUNDS HAVING 8 TO 20 CARBON ATOMS PER MOLECULE COMPRISING PARAFFINS, MONO-HALO-PARAFFINS, AND POLY-HALO-PARAFFINS, SAID HALO- BEING SELECTED FROM CHLORO- AND BROMO-, WHICH COMPRISES: CONTACTING SAID MIXTURE WITH LIQUID SO2 AT A TEMPERATURE BETWEEN -25 AND 50*C. WITH A VOLUME RATIO OF LIQUID SO2 TO MIXTURE OF FROM 0.5:1 TO 5:1 TO FORM AN EXTRACT PHASE RICH IN SO2 AND SAID HALOPARAFFINS AND A RAFFINATE PHASE RICH IN SAID PARAFFINS; SEPARATING SAID PHASE; CONTACTING SAID HALO-PARAFFINS IN SAID EXTRACT PHASE WITH LIQUID SO2 AT A TEMPERATURE BETWEEN -25 AND 50*C. WITH A VOLUME RATIO OF SO2 TO HALO-PARAFFINS OF FROM 0.5:1 TO 5:1 TO FORM A RAFFINATE PHASE RICH IN MONO-HALO PARAFFINS AND AN EXTRACT PHASE RICH IN POLY-HALO PARAFFINS; SEPARATING SAID PHASE RICH IN MONO-HALO-PARAFFINS FROM SAID PHASE RICH IN POLY-HALO-PARAFFINS; AND RECOVERING SAID PARAFFIN, SAID MONO-HALO PARAFFIN, AND SAID POLY-HALO-PARAFFINS FROM THEIR RESPECTIVE PHASES.
Claim 2
Dependent Claim
153 words
A PROCESS FOR SEPARATING A MIXTURE OF COMPOUNDS HAVING 8 TO 20 CARBON ATOMS PER MOLECULE COMPRISING PARAFFINS, MONO-HALO-PARAFFINS, AND POLY-HALO-PARAFFINS, SAID HALO- BEING SELECTED FROM CHLORO- AND BROMO-, WHICH COMPRISES: CONTACTING SAID MIXTURE WITH LIQUID SO2 AT A TEMPERATURE BETWEEN -25 AND 50*C. WITH A VOLUME RATIO OF LIQUID SO2 TO MIXTURE OF FROM 0.5:1 TO 5:1 TO FORM AN EXTRACT PHASE RICH IN SO2 AND SAID HALOPARAFFINS AND A RAFFINATE PHASE RICH IN SAID PARAFFINS; SEPARATING SAID PHASE; CONTACTING SAID HALO-PARAFFINS IN SAID EXTRACT PHASE WITH LIQUID SO2 AT A TEMPERATURE BETWEEN -25 AND 50*C. WITH A VOLUME RATIO OF SO2 TO HALO-PARAFFINS OF FROM 0.5:1 TO 5:1 TO FORM A RAFFINATE PHASE RICH IN MONO-HALO PARAFFINS AND AN EXTRACT PHASE RICH IN POLY-HALO PARAFFINS; SEPARATING SAID PHASE RICH IN MONO-HALO-PARAFFINS FROM SAID PHASE RICH IN POLY-HALO-PARAFFINS; AND RECOVERING SAID PARAFFIN, SAID MONO-HALO PARAFFIN, AND SAID POLY-HALO-PARAFFINS FROM THEIR RESPECTIVE PHASES.
References Cited (Backward Citations)
US2045806A
Cited
US2015748A
Cited
US2394851A
Cited
US2429887A
Cited
US2463497A
Cited
US2533517A
Cited
US2740807A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-04 | 1970-01-03 | 1970-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-04 | 1974-01-03 | 1974-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-04 | 1978-01-03 | 1978-07-05 | $7700.00 | Window Closed / Lapsed |