US3705886A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for polymerization or copolymerization of ethylene
Assignee: Mitsui Chemicals Inc
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Filing: 1970-11-23
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Granted: 1972-12-12
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Expires: 1990-11-23
Abstract
Abstract IN THE PROCESS FOR POLYMERIZING ETHYLENE OR COPOLYMERIZING ETHYLENE WITH A COMONOMER SELECTED FROM THE GROUP CONSISTING OF 1-OLEFINES HAVING FROM 3 TO 8 CARBON ATOMS AND DIOLEFINES HAVING FROM 4 TO 10 CARBON ATOMS, IN AN INERT SOLVENT IN THE PRESENCE OF A CATALYST COMPRISING A TITAMIUM OR VANADIUM HALOGEN COMPOUND BONDED ONTO THE SURFACE OF INORGANC SOLID PARTICLES, AND AN ORGANOALUMINUM COMPOUND OR A DIALKYL ZINC; AN IMPROVEMENT WHEREIN SAID INORGANIC SOLID PARTICLES ARE PARTICLES OF A SYNTHETIC DOUBLE OXIDE OF MAGNESIUM AND ALUMINUM, AND SAID SYNTHETIC DOUBLE OXIDE HAS THE ATOMIC RADIO OF MG/AL IN THE RANGE OF FROM 0.02 TO 100.
Inventors
- 👤 Norio Kashiwa
- 👤 Tohoru Tomoshige
- 👤 Toshio Kobayashi
- 👤 Shiro Honma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:50
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-12 | 1976-06-12 | 1976-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-12 | 1980-06-12 | 1980-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-12 | 1984-06-12 | 1984-12-12 | $7700.00 | Window Closed / Lapsed |