US3068217A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for polymerizing diolefins in the presence of allene or dimethyl acetylene
Assignee: Shell USA Inc
•
Filing: 1959-10-23
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Granted: 1962-12-11
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Expires: 1979-10-23
Abstract
No abstract record available.
Inventors
- 👤 Thair L Higgins
- 👤 Jr Charles H Wilcoxen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:27
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04; Y; Y10; Y10S; Y10S526/00; Y10S526/903; Y10S585/00; Y10S585/949; Y10S585/952
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
IN THE PROCESS FOR POLYMERIZING PURIFIED CONJUGATED DIOLEFINS OF 4 TO 9 CARBON ATOMS PER MOLECULE IN SUBSTANTIALLY ANHYDROUS SOLUTION AT A TEMPERATURE BETWEEN 0* AND 100*C. IN THE PRESENCE OF FROM ABOUT 10-5 TO ABOUT 10-1 MOLE, PER MOL OF CONJUGATED DIENE, OF A CATALYST FROM THE GROUP CONSISTING OF DISSOLVED COMPOUNDS OF DIVALENT NICKEL AND COBALT, AND A COCATALYST OF THE GROUP CONSISTING OF ALUMINUM TRIALKYS, ALUMINUM ALKYL HALIDES AND ALKYL ALUMINUM HYDRIDES, THE IMPROVEMENT WHICH COMPRISES CONDUCTING THE POLYMERIZATION IN THE PRESENCE OF A CONTROLLED MOLECULAR WEIGHT SUPPRESSING AMOUNT OF ADDED ALLENE IN THE RANGE FROM 1 TO 3000 PARTS PER MILLION PARTS OF CONJUGATED DIOLEFIN,
Claim 2
Dependent Claim
109 words
IN THE PROCESS FOR POLYMERIZING PURIFIED CONJUGATED DIOLEFINS OF 4 TO 9 CARBON ATOMS PER MOLECULE IN SUBSTANTIALLY ANHYDROUS SOLUTION AT A TEMPERATURE BETWEEN 0* AND 100*C. IN THE PRESENCE OF FROM ABOUT 10-5 TO ABOUT 10-1 MOLE, PER MOL OF CONJUGATED DIENE, OF A CATALYST FROM THE GROUP CONSISTING OF DISSOLVED COMPOUNDS OF DIVALENT NICKEL AND COBALT, AND A COCATALYST OF THE GROUP CONSISTING OF ALUMINUM TRIALKYS, ALUMINUM ALKYL HALIDES AND ALKYL ALUMINUM HYDRIDES, THE IMPROVEMENT WHICH COMPRISES CONDUCTING THE POLYMERIZATION IN THE PRESENCE OF A CONTROLLED MOLECULAR WEIGHT SUPPRESSING AMOUNT OF ADDED ALLENE IN THE RANGE FROM 1 TO 3000 PARTS PER MILLION PARTS OF CONJUGATED DIOLEFIN,
References Cited (Backward Citations)
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US2898327A
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US2953554A
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US2977349A
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US2935540A
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US2953556A
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US2970134A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-10 | 1966-06-11 | 1966-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-10 | 1970-06-11 | 1970-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-10 | 1974-06-11 | 1974-12-11 | $7700.00 | Window Closed / Lapsed |