US3100764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control of pentane-soluble polymers in the polymerization of propylene
Assignee: Sunoco Inc
•
Filing: 1960-08-04
•
Granted: 1963-08-13
•
Expires: 1980-08-04
Abstract
No abstract record available.
Inventors
- 👤 James L Jezl
- 👤 Habet M Khelghatian
- 👤 Louise D Hague
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:00
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
104 words
A PROCESSS FOR POLYMERIZING PROPYLENE WHICH COMPRISES CONTACTING PROLYLENE AT A TEMPERATURE OF FROM 30*C TO 200*C. WITH A CATALYST SYSTEM CONSISTING ESSENTIALLY OF A HALIDE SELECTED FROM THE GROUP CONSISTING OF TITANIUM TRICHLORIDE AND TITANIUM TETRACHLORIDE, AN ORGANOALUMINUM COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALUMINUM ALKYLS AND ALUMINUM ALKYL HALIDES, AND AN N-SUBSTITUTED PYRROLIDONE, THE SUBSTITUENT BEING SELECTED FROM THE GROUP CONSISTING OF ALKYLS AND ALKENYL RADICALS, WHEREIN THE ATOMIC RATIO OF ALUMINUM TO TITANIUM IS FROM 1:1 TO 10:1, AND THE ATOMIC RATIO OF ALUMINUM TO PYRROLIDONE IS FROM 30:1 TO 3:2, AND RECOVERING A SOLID, PREDOMINANTLY ISOTACTIC, POLYMER OF PROPYLENE.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-08-12 | 1967-02-11 | 1967-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-12 | 1971-02-11 | 1971-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-12 | 1975-02-11 | 1975-08-13 | $7700.00 | Window Closed / Lapsed |