US3156537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for controlling catalyst concentration in the production of solid olefin polymers
Assignee: Phillips Petroleum Co
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Filing: 1959-05-25
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Granted: 1964-11-10
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Expires: 1979-05-25
Abstract
No abstract record available.
Inventors
- 👤 Norman F Mcleod
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:01
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86389; Y10T137/86405; Y10T137/86421
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
APPARATUS COMPRISING IN COMBINATION A POLYMERIZATION REACTOR, MEANS FOR INTRODUCING LIQUID DILUENT, OLEFIN AND CATALYST TO SAID REACTOR, MEANS FOR WITHDRAWING REACTION EFFLUENT FROM SAID REACTOR, A VESSEL COMMUNICATING WITH SAID MEANS FOR WITHDRAWING REACTION EFFLUENT, MEANS FOR PERIODICALLY VAPOR SEALING SAID VESSSEL, MEANS FOR INCREASING THE VOLUME OF THE SEALED VESSEL, MEANS FOR MEASURING PRESSURE IN SAID VESSEL AND MEANS FOR VARYING THE QUANTITY OF CATALYST INTRODUCED TO THE REACTOR IN RESPONSE TO AND DIRECTLY PROPORTIONAL TO THE PRESSURE IN SAID VESSEL.
Claim 2
Dependent Claim
83 words
APPARATUS COMPRISING IN COMBINATION A POLYMERIZATION REACTOR, MEANS FOR INTRODUCING LIQUID DILUENT, OLEFIN AND CATALYST TO SAID REACTOR, MEANS FOR WITHDRAWING REACTION EFFLUENT FROM SAID REACTOR, A VESSEL COMMUNICATING WITH SAID MEANS FOR WITHDRAWING REACTION EFFLUENT, MEANS FOR PERIODICALLY VAPOR SEALING SAID VESSSEL, MEANS FOR INCREASING THE VOLUME OF THE SEALED VESSEL, MEANS FOR MEASURING PRESSURE IN SAID VESSEL AND MEANS FOR VARYING THE QUANTITY OF CATALYST INTRODUCED TO THE REACTOR IN RESPONSE TO AND DIRECTLY PROPORTIONAL TO THE PRESSURE IN SAID VESSEL.
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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) | 1967-11-10 | 1968-05-11 | 1968-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-10 | 1972-05-11 | 1972-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-10 | 1976-05-11 | 1976-11-10 | $7700.00 | Window Closed / Lapsed |