US3282906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization catalyst and process
Assignee: Shell USA Inc
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Filing: 1962-09-17
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Granted: 1966-11-01
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Expires: 1982-09-17
Abstract
No abstract record available.
Inventors
- 👤 Jr John Boor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:27
CPC Classifications
C; C08; C08F; C08F110/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
115 words
IN THE POLYMERIZATION OF ALPHA-MONOOLEFINIC HYDROCARBON MATERIAL OF 3 TO 7 CARBON ATOMS PER MOLECULE TO FROM SOLID, CRYSTALLIZABLE POLYMER, THE IMPROVEMENT WHICH COMPRISES EFFECTING THE POLYMERIZATION IN LIQUID DISPERSION IN HYDROCARBON DILUENT AND IN THE PRESENCE OF A CATALYST CONSISTING ESSENTIALLY OF AN ALKYL ALUMINUM DICHLORIDE WHEREIN THE ALKYL RADICALS CONTAIN 1 TO 12 CARBON ATOMS, TITANIUM TRICHLORIDE SELECTED FROM THW FROUP CONSISTING OF THE ACTIVE ALPHA, BETA, GAMMA AND DELTA FORMS OF TITANIUM TRICHLORIDE AND A THIRD COMPOUND HAVING THE FORMULA (R''O)2CO WHEREIN R'' IS AN ALKYL GROJP OF 1 TO 10 CARBON ATOMS, THE MOLAR RATIO OF SAID THIRD COMPOUND TO SAID ALUMINUM DICHLORIDE BEING WITH THE RANGE OF 0.1:1 TO 1:1
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) | 1969-10-31 | 1970-05-02 | 1970-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-31 | 1974-05-02 | 1974-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-31 | 1978-05-02 | 1978-11-01 | $7700.00 | Window Closed / Lapsed |