Patent US2044659A successfully refreshed from Google Patents.
Patent US2514332A successfully refreshed from Google Patents.
US2514332A
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Method of producing monomeric olefins
Assignee: Standard Oil Development Co
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Filing: 1948-02-14
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Granted: 1950-07-04
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Expires: 1968-02-14
Abstract
No abstract record available.
Inventors
- 👤 Eger V Murphree
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:59
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/1818; B01J8/1827; B01J8/24; B01J8/26; C; C07; C07C; C07C4/00; C07C4/22; C07C2521/00; C07C2521/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
AN IMPROVED PROCESS FOR SELECTIVELY DEPOLYMERIZING ISOBUTYLENE POLYMERS WHICH ARE DIMERS AND TRIMMERS TO FORM SUBSTANTIALLY PURE ISOBUTYLENE MONOMER, WHICH COMPRISES INTRODUCING A FEED STREAM OF SAID POLYMERS MIXED WITH BUYLENE COPOLYMERS PREHEATED TO A TEMPERATURE BETWEEN 500 AND 800*F. INTO CONTACT WITH A HEATED FINELY DIVIDED DEPOLYMERIZATION CATALYST MAINTAINED AT A TEMPERATURE IN THE SAME RANGE BY SENSIBLE HEAT OF THE COPOLYMERS, FLUIDIZING SAID CATALYST WITHIN SAID REACTION ZONE SO THAT THE CATALYST FORMS A DENSE SUSPENSION HAVING A PREDETERMINED UPPER LEVEL, WITHDRAWING A GASEOUS PRODUCT STREAM FROM ABOVE SAID UPPER LEVEL OF THE DENSE SUSPENSION, FREEING SAID GASEOUS PRODUCT STREAM OF CATALYST PARTICLES, AND FRACTIONATING FROM THE GASEOUS PRODUCT STREAM A GASEOUS STREAM COMPOSED SUBSTANTIALLY OF PURE ISOBUTYLENE MONOMER.
Claim 2
Dependent Claim
121 words
AN IMPROVED PROCESS FOR SELECTIVELY DEPOLYMERIZING ISOBUTYLENE POLYMERS WHICH ARE DIMERS AND TRIMMERS TO FORM SUBSTANTIALLY PURE ISOBUTYLENE MONOMER, WHICH COMPRISES INTRODUCING A FEED STREAM OF SAID POLYMERS MIXED WITH BUYLENE COPOLYMERS PREHEATED TO A TEMPERATURE BETWEEN 500 AND 800*F. INTO CONTACT WITH A HEATED FINELY DIVIDED DEPOLYMERIZATION CATALYST MAINTAINED AT A TEMPERATURE IN THE SAME RANGE BY SENSIBLE HEAT OF THE COPOLYMERS, FLUIDIZING SAID CATALYST WITHIN SAID REACTION ZONE SO THAT THE CATALYST FORMS A DENSE SUSPENSION HAVING A PREDETERMINED UPPER LEVEL, WITHDRAWING A GASEOUS PRODUCT STREAM FROM ABOVE SAID UPPER LEVEL OF THE DENSE SUSPENSION, FREEING SAID GASEOUS PRODUCT STREAM OF CATALYST PARTICLES, AND FRACTIONATING FROM THE GASEOUS PRODUCT STREAM A GASEOUS STREAM COMPOSED SUBSTANTIALLY OF PURE ISOBUTYLENE MONOMER.
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) | 1953-07-03 | 1954-01-02 | 1954-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-03 | 1958-01-02 | 1958-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-03 | 1962-01-02 | 1962-07-04 | $7700.00 | Window Closed / Lapsed |