US2761889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suspension-type polymerization process
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1952-09-17
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Granted: 1956-09-04
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Expires: 1972-09-17
Abstract
No abstract record available.
Inventors
- 👤 Walter G May
- 👤 Co The Summit Trust
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:23
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/14; C07C2/18; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/903; Y10S585/949; Y10S585/955
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A CONTINOUS NON-REGENERATIVE CATALYTIC PROCESS FOR POLYMERIZING OLEFIN HYDROCARBONS WHICH COMPRISES PROVIDING A REACTION ZONE INCLUDING A BOTTOM OLEFIN FEED INLET AND A TOP EFFLUENT OUTLET, MAINTAINING THROUGHOUT SAID ZONE A SUSPENSION OF FINELY DIVIDE SOLID POLYMERIZATION CATALYST IN FLUID HYDROCARBON, CONTINUOUSLY PASSING OLEFIN FEED UPWARDLY THROUGH SAID SUSPENSION AT POLYMERZATION CONDITIONS, CONTINUOUSLY WITHDRAWING EFFLUENT SUSPENSION FROM THE UPPER PART OF SAID ZONE AND SEPARATING SOLIDS FROM SAID EFFLUENT SUSPENSION, DIVIDING THE RESULTING SUBSTANTIALLY SOLID-FREE EFFLUENT INTO A PRODUCT STREAM AND A RECYCLE STREAM, INTRODUCING SAID RECYCLE STREAM INTO SAID
Claim 2
Dependent Claim
90 words
A CONTINOUS NON-REGENERATIVE CATALYTIC PROCESS FOR POLYMERIZING OLEFIN HYDROCARBONS WHICH COMPRISES PROVIDING A REACTION ZONE INCLUDING A BOTTOM OLEFIN FEED INLET AND A TOP EFFLUENT OUTLET, MAINTAINING THROUGHOUT SAID ZONE A SUSPENSION OF FINELY DIVIDE SOLID POLYMERIZATION CATALYST IN FLUID HYDROCARBON, CONTINUOUSLY PASSING OLEFIN FEED UPWARDLY THROUGH SAID SUSPENSION AT POLYMERZATION CONDITIONS, CONTINUOUSLY WITHDRAWING EFFLUENT SUSPENSION FROM THE UPPER PART OF SAID ZONE AND SEPARATING SOLIDS FROM SAID EFFLUENT SUSPENSION, DIVIDING THE RESULTING SUBSTANTIALLY SOLID-FREE EFFLUENT INTO A PRODUCT STREAM AND A RECYCLE STREAM, INTRODUCING SAID RECYCLE STREAM INTO SAID
References Cited (Backward Citations)
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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) | 1959-09-04 | 1960-03-05 | 1960-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-04 | 1964-03-05 | 1964-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-04 | 1968-03-05 | 1968-09-04 | $7700.00 | Window Closed / Lapsed |