Patent US2944097A successfully refreshed from Google Patents.
US2944097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for isomerizing light straight chain paraffins
Assignee: Gulf Research and Development Co
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Filing: 1957-12-31
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Granted: 1960-07-05
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Expires: 1977-12-31
Abstract
No abstract record available.
Inventors
- 👤 William C Starnes
- 👤 Robert C Zabor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:00
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/22; C07C5/27; C07C5/2702; C07C5/2724; C07C5/2767; C07C5/277; C07C5/2791
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
A PROCESS WHICH COMPRISES CONTACTING WITH A PLATINUM-ALUMINA CATALYST A FEED STREAM CONSISTING OF A HYDROCARBON FRACTION, HYDROGEN AND A VOLATILE HALOGEN-CONTAINING MATERIAL SELECTED FROM THE GROUP CONSISTING OF FREE HALOGENS, HYDROGEN HALIDES AND HYDROCARBON HALIDES, AT LEAST 90 PERCENT OF SAID HYDROCARBON FRACTION CONSISTING OF ALIPHATIC PARAFFINS HAVING 5 TO 7 CARBON ATOMS, AT A TEMPERATURE FROM 600* TO 900* F., AT A PRESSURE OF 375 TO 600 POUNDS PER SQUARE INCH GAUGE, AT A LIQUID HOURLY SPACE VELOCITY GREATER THAN 5 VOLUMES OF HYDROCARBON PER VOLUME OF CATALYST PER HOUR AND WITH A HYDROGEN CONCENTRATION LESS THAN THE CONCENTRATION CORRESPONDING TO A MOL FRACTION OF HYDROCARBON OF 0.5 BUT GREATER THAN THE HYDROGEN CONCENTRATION CORRESPONDING TO RAPID CATALYST AGING, THE CONCENRATION OF SAID HALOGEN-CONTAINING MATERIAL IN THE FEED CORRESPONDING TO 10 TO 150 PARTS BY WEIGHT OF HALOGEN PER MILLION PARTS OF HYDROCARBON, AND RECOVERING A CONVERCION PRODUCT OF SUBSTANTIALLY THE SAME AVERAGE MOLECULAR WEIGHT AS THE HYDROCARBON FEED.
Claim 2
Dependent Claim
161 words
A PROCESS WHICH COMPRISES CONTACTING WITH A PLATINUM-ALUMINA CATALYST A FEED STREAM CONSISTING OF A HYDROCARBON FRACTION, HYDROGEN AND A VOLATILE HALOGEN-CONTAINING MATERIAL SELECTED FROM THE GROUP CONSISTING OF FREE HALOGENS, HYDROGEN HALIDES AND HYDROCARBON HALIDES, AT LEAST 90 PERCENT OF SAID HYDROCARBON FRACTION CONSISTING OF ALIPHATIC PARAFFINS HAVING 5 TO 7 CARBON ATOMS, AT A TEMPERATURE FROM 600* TO 900* F., AT A PRESSURE OF 375 TO 600 POUNDS PER SQUARE INCH GAUGE, AT A LIQUID HOURLY SPACE VELOCITY GREATER THAN 5 VOLUMES OF HYDROCARBON PER VOLUME OF CATALYST PER HOUR AND WITH A HYDROGEN CONCENTRATION LESS THAN THE CONCENTRATION CORRESPONDING TO A MOL FRACTION OF HYDROCARBON OF 0.5 BUT GREATER THAN THE HYDROGEN CONCENTRATION CORRESPONDING TO RAPID CATALYST AGING, THE CONCENRATION OF SAID HALOGEN-CONTAINING MATERIAL IN THE FEED CORRESPONDING TO 10 TO 150 PARTS BY WEIGHT OF HALOGEN PER MILLION PARTS OF HYDROCARBON, AND RECOVERING A CONVERCION PRODUCT OF SUBSTANTIALLY THE SAME AVERAGE MOLECULAR WEIGHT AS THE HYDROCARBON FEED.
References Cited (Backward Citations)
US2798105A
Cited
US2831908A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |