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Patent US3296331A successfully refreshed from Google Patents.
US3296331A
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Liquid phase polymerization of olefins using a zinc fluoride-alumina catalyst
Assignee: Sinclair Research Inc
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Filing: 1962-08-24
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Granted: 1967-01-03
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Expires: 1982-08-24
Abstract
No abstract record available.
Inventors
- 👤 Stephen M Kovach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:33
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/14; C07C2/20; C07C2/22; C07C2521/00; C07C2521/02; C07C2521/04; C07C2527/00; C07C2527/06; C07C2527/138
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A PROCESS FOR THE SELECTIVE POLYMERIZATION OF AN OLEFIN SELECTED FROM THE GROUP CONSISTING OF PROPYLENE AND ISOBUTYLENE TO POLYMERS WHOSE MOLECULAR WEIGHTS CORRESPOND TO MULTIPLE UNITS OF SAID OLEFIN WHICH CONSISTS ESSENTIALLY OF POLYMERIZING SAID OLEFIN IN THE LIQUID PHASE AT A TEMPERATURE OF ABOUT 70 TO 180*F. AND A PRESSURE OF ABOUT 200 TO 800 P.S.I.G. IN CONTACT WITH A CATALYST CONSISTING ESSENTIALLY OF A CATALYTIC AMOUNT OF ABOUT 1 TO 20% BY WEIGHT ZINC FLUORIDE SUPPORTED ON ACTIVATED ALUMINA.
Claim 2
Dependent Claim
82 words
A PROCESS FOR THE SELECTIVE POLYMERIZATION OF AN OLEFIN SELECTED FROM THE GROUP CONSISTING OF PROPYLENE AND ISOBUTYLENE TO POLYMERS WHOSE MOLECULAR WEIGHTS CORRESPOND TO MULTIPLE UNITS OF SAID OLEFIN WHICH CONSISTS ESSENTIALLY OF POLYMERIZING SAID OLEFIN IN THE LIQUID PHASE AT A TEMPERATURE OF ABOUT 70 TO 180*F. AND A PRESSURE OF ABOUT 200 TO 800 P.S.I.G. IN CONTACT WITH A CATALYST CONSISTING ESSENTIALLY OF A CATALYTIC AMOUNT OF ABOUT 1 TO 20% BY WEIGHT ZINC FLUORIDE SUPPORTED ON ACTIVATED ALUMINA.
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) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |