US3040016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization process
Assignee: Shell USA Inc
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Filing: 1960-03-28
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Granted: 1962-06-19
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Expires: 1980-03-28
Abstract
No abstract record available.
Inventors
- 👤 Jaroslav G Balas
- 👤 Lee M Porter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:29
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
138 words
A POLYMERIZATION PROCESS WHICH COMPRISES CONTACTING A CONJUGATED DIOLEFIN HYDROCARBON HAVING FROM 4 TO 7 CARBON ATOMS PER MOLECULE IN SUBSTANTIALLY ANHYDROUS SOLUTION AT A TEMPERATURE IN THE RANGE FROM -40* TO 150* C. WITH A CATALYST PREPARED BY ADMIXING COBALTOUS HALIDE AND AT LEAST ABOUT 2 MOLES, PER MOLE OF COBALTOUS HALIDE, OF A COMPOUND FROM THE GROUP CONSISTING OF (RO)3P AND (RO)3PO, WHEREIN R IS A HYDROCARBYL GROUP OF 1 TO 12 CARBON ATOMS, HAVING NO OLEFINIC DOUBLE BONDS, WITH A HYDROCARBON SOLVENT AND AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF ALUMINUM TRIALKYL, ALUMINUM ALKYL HALIDES AND MIXTURES THEREOF, HAVING 1 TO 10 CARBON ATOMS PER ALKYL GROUP, THE CONCENTRATION OF COBALT IN SOLUTION BEING SUCH AS TO PROVIDE THEREIN A RATIO OF ATOMS OF ALUMINUM TO ATOMS OF COBALT GREATER THAN 10:1.
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) | 1965-06-18 | 1965-12-18 | 1966-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-18 | 1969-12-18 | 1970-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-18 | 1973-12-18 | 1974-06-19 | $7700.00 | Window Closed / Lapsed |