US3029231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for polymerizing olefins
Assignee: Shell USA Inc
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Filing: 1957-09-27
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Granted: 1962-04-10
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Expires: 1977-09-27
Abstract
No abstract record available.
Inventors
- 👤 Gerrit Jan Van Amerongen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:45
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
IN A PROCESS FOR THE POLYMERIZATION OF ALPHA-OLEFINS OF 2 TO 3 CARBON ATOMS AT TEMPERATURES BELOW ABOUT 150* C. AND PRESSURES BELOW ABOUT 500 P.S.I., THE POLYMERIZATION BEING CONDUCTED IN CONTACT WITH A CATALYST COMPRISING THE REACTION PRODUCT OF A HALIDE OF A METAL SELECTED FROM GROUPS IVB, VB, VIB, AND VIII OF THE PERIODIC TABLE AND AN ALUMINUM ALKYL, AND AN INERT HYDROCARBON SOLVENT FOR THE MONOMER, THE IMPROVEMENT WHICH COMPRISES CONDUCTING THE POLYMERIZATION IN THE PRESENCE OF FROM 0.001 TO 5 MOLAR PERCENT BY WEIGHT OF VINYL CHLORIDE BASED ON THE WEIGHT OF ALPHA-OLEFIN.
Claim 2
Dependent Claim
97 words
IN A PROCESS FOR THE POLYMERIZATION OF ALPHA-OLEFINS OF 2 TO 3 CARBON ATOMS AT TEMPERATURES BELOW ABOUT 150* C. AND PRESSURES BELOW ABOUT 500 P.S.I., THE POLYMERIZATION BEING CONDUCTED IN CONTACT WITH A CATALYST COMPRISING THE REACTION PRODUCT OF A HALIDE OF A METAL SELECTED FROM GROUPS IVB, VB, VIB, AND VIII OF THE PERIODIC TABLE AND AN ALUMINUM ALKYL, AND AN INERT HYDROCARBON SOLVENT FOR THE MONOMER, THE IMPROVEMENT WHICH COMPRISES CONDUCTING THE POLYMERIZATION IN THE PRESENCE OF FROM 0.001 TO 5 MOLAR PERCENT BY WEIGHT OF VINYL CHLORIDE BASED ON THE WEIGHT OF ALPHA-OLEFIN.
References Cited (Backward Citations)
US2422392A
Cited
US2825721A
Cited
BE538782A
Cited
US2905645A
Cited
US2882263A
Cited
US2898327A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-09 | 1965-10-09 | 1966-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-09 | 1969-10-09 | 1970-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-09 | 1973-10-09 | 1974-04-10 | $7700.00 | Window Closed / Lapsed |