Patent US3345431A successfully refreshed from Google Patents.
US3345431A
Expired / Lapsed
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Method for preparing block copolymers of monoolefins
Assignee: Phillips Petroleum Co
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Filing: 1964-07-24
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Granted: 1967-10-03
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Expires: 1984-07-24
Abstract
No abstract record available.
Inventors
- 👤 Arthur A Harban
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:36
CPC Classifications
C; C08; C08F; C08F297/00; C08F297/06; C08F297/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
185 words
A METHOD OF BLOCK COPOLYMERIZING TWO DIFFERENT MONO-1-OLEFINS, EACH IN THE SUBSTANTIAL ABSENCE OF THE OTHER, WHICH COMPRISES CONTACTING ONE OF SAID OLEFINS IN A FIRST REACTION ZONE WITH A COORDINATING CATALYST SYSTEM FORMED FROM AT LEAST TWO COMPONENTS WHICH ARE A METAL COMPOUND AND A REDUCING AGENT UNDER POLYMERIZATION CONDITIONS IN AN INERT LIQUID DILUENT HAVING A BOILING POINT SUBSTANTIALLY DIFERENT FROM SAID OLEFINS, THEREBY FORMING SLURRY OF FIRST POLYMER IN SAID DILUENT, PASSING SAID SLURRY TO THEUPPER PORTION OF A VERTICALLY ELONGATED WASHING ZONE WHEREIN SAID FIRST POLYMER IS ALLOWED TO SETTLE, INTRODUCING THE OTHER OF SAID OLEFIN IN LIQUID PHASE TO THE LOWER PORTION OF SAID WASHING ZZONE IN SUFFICIENT AMOUNT TO CAUSE UPWARD FLOW OF SOME OF SAID OTHER OLEFIN, PASSING SAID FIRST POLYMER, SOME OF SAID OTHER OLEFIN AND ADDITIONAL REDUCING AGENT CATALYST COMPONENT INTO A SECOND REACTION ZONE WHICH IS MAINTAINED UNDER POLYMERIZATION CONDITIONS, WITHDRAWING FROM SAID WASHING ZONE AN OVERHEAD STREAM CONTAINING SAID OLEFINS AND SAID DILUENT, FRACTIONATING SAID OVERHEAD STREAM TO SEPARATE EACH OLEFIN AND DILUENT, RECYCLING SAID ONE OLEFIN AND SAID DILUENT TO SAID FIRST ZONE
Claim 2
Independent Claim
185 words
A METHOD OF BLOCK COPOLYMERIZING TWO DIFFERENT MONO-1-OLEFINS, EACH IN THE SUBSTANTIAL ABSENCE OF THE OTHER, WHICH COMPRISES CONTACTING ONE OF SAID OLEFINS IN A FIRST REACTION ZONE WITH A COORDINATING CATALYST SYSTEM FORMED FROM AT LEAST TWO COMPONENTS WHICH ARE A METAL COMPOUND AND A REDUCING AGENT UNDER POLYMERIZATION CONDITIONS IN AN INERT LIQUID DILUENT HAVING A BOILING POINT SUBSTANTIALLY DIFERENT FROM SAID OLEFINS, THEREBY FORMING SLURRY OF FIRST POLYMER IN SAID DILUENT, PASSING SAID SLURRY TO THEUPPER PORTION OF A VERTICALLY ELONGATED WASHING ZONE WHEREIN SAID FIRST POLYMER IS ALLOWED TO SETTLE, INTRODUCING THE OTHER OF SAID OLEFIN IN LIQUID PHASE TO THE LOWER PORTION OF SAID WASHING ZZONE IN SUFFICIENT AMOUNT TO CAUSE UPWARD FLOW OF SOME OF SAID OTHER OLEFIN, PASSING SAID FIRST POLYMER, SOME OF SAID OTHER OLEFIN AND ADDITIONAL REDUCING AGENT CATALYST COMPONENT INTO A SECOND REACTION ZONE WHICH IS MAINTAINED UNDER POLYMERIZATION CONDITIONS, WITHDRAWING FROM SAID WASHING ZONE AN OVERHEAD STREAM CONTAINING SAID OLEFINS AND SAID DILUENT, FRACTIONATING SAID OVERHEAD STREAM TO SEPARATE EACH OLEFIN AND DILUENT, RECYCLING SAID ONE OLEFIN AND SAID DILUENT TO SAID FIRST ZONE
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) | 1970-10-02 | 1971-04-03 | 1971-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-02 | 1975-04-03 | 1975-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-02 | 1979-04-03 | 1979-10-03 | $7700.00 | Window Closed / Lapsed |