Patent US3290405A successfully refreshed from Google Patents.
US3290405A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of isoolefins
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1962-11-07
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Granted: 1966-12-06
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Expires: 1982-11-07
Abstract
No abstract record available.
Inventors
- 👤 Rosenberg Hermann E Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:30
CPC Classifications
C; C07; C07C; C07C11/00; C07C11/02; C10; C10G; C10G11/00; C10G11/14; C10G11/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
184 words
A METHOD WHICH COMPRISES PASSING A HYDROCARBON FEED STOCK INTO THE SECOND ZONE OF A TRANSFER LINE REACTOR COMPRISING A FIRST ZONE AND A SECOND ZONE, CONTACTING SAID FEED STOCK IN SAID SECOND ZONE WITH A CRACKING CATALYST AT A TEMPERATURE WITHIN THE RANGE OF 850*F. TO 1050*F. AND A TIME PERIOD WITHIN THE RANGE OF ABOUT 1 TO ABOUT 10 SECONDS, PASSING SAID CATALYST AND THE REACTED HYDROCARBON INTO A SEPARATION ZONE, SEPARATING SAID CATALYST FROM SAID HYDROCARBON, SEPARATING SAID HYDROCARBON INTO FRACTIONS, INCLUDING A LIGHT HYDROCARBON FRACTION INCLUDING AN ISOOLEFIN AND A NORMAL OLEFIN, SEPARATING SAID LIGHT HYDROCARBON FRACTION INTO AN ISOOLEFIN FRACTION AND AN ISOOLEFIN-ATTENUATED FRACTION, PASSING SAID ISOOLEFIN-ATTENUATED FRACTION INTO SAID FIRST ZONE INTO CONTACT WITH CRACKING CATALYST AT A TEMPERATURE WITHIN THE RANGE OF 850*F. TO 1050*F., AT A CATALYST TO OIL RATIO WITHIN THE RANGE FROM 2.5:1 TO 25:1, AND FOR A TIME PERIOD WITHIN THE RANGE OF 0.5 SECOND ABOUT 5.0 SECONDS TO OBTAIN A RE-EQUILIBRATED STREAM, AND PASSING ALL OF SAID CATALYST AND SAID RE-EQUILIBRATED STREAM INTO SAID SECOND ZONE, THEREBY MAXIMIZING THE PRODUCTION OF ISOOLEFINS.
Claim 2
Independent Claim
184 words
A METHOD WHICH COMPRISES PASSING A HYDROCARBON FEED STOCK INTO THE SECOND ZONE OF A TRANSFER LINE REACTOR COMPRISING A FIRST ZONE AND A SECOND ZONE, CONTACTING SAID FEED STOCK IN SAID SECOND ZONE WITH A CRACKING CATALYST AT A TEMPERATURE WITHIN THE RANGE OF 850*F. TO 1050*F. AND A TIME PERIOD WITHIN THE RANGE OF ABOUT 1 TO ABOUT 10 SECONDS, PASSING SAID CATALYST AND THE REACTED HYDROCARBON INTO A SEPARATION ZONE, SEPARATING SAID CATALYST FROM SAID HYDROCARBON, SEPARATING SAID HYDROCARBON INTO FRACTIONS, INCLUDING A LIGHT HYDROCARBON FRACTION INCLUDING AN ISOOLEFIN AND A NORMAL OLEFIN, SEPARATING SAID LIGHT HYDROCARBON FRACTION INTO AN ISOOLEFIN FRACTION AND AN ISOOLEFIN-ATTENUATED FRACTION, PASSING SAID ISOOLEFIN-ATTENUATED FRACTION INTO SAID FIRST ZONE INTO CONTACT WITH CRACKING CATALYST AT A TEMPERATURE WITHIN THE RANGE OF 850*F. TO 1050*F., AT A CATALYST TO OIL RATIO WITHIN THE RANGE FROM 2.5:1 TO 25:1, AND FOR A TIME PERIOD WITHIN THE RANGE OF 0.5 SECOND ABOUT 5.0 SECONDS TO OBTAIN A RE-EQUILIBRATED STREAM, AND PASSING ALL OF SAID CATALYST AND SAID RE-EQUILIBRATED STREAM INTO SAID SECOND ZONE, THEREBY MAXIMIZING THE PRODUCTION OF ISOOLEFINS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |