US3759884A
Expired / Lapsed
US
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He use of a catalyst supported by a carrier process for the polymerization or copolymerization of ethylene with t
Assignee: Mitsui Chemicals Inc
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Filing: 1968-11-14
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Granted: 1973-09-18
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Expires: 1988-11-14
Abstract
Abstract IN THE PROCESS FOR THE POLYMERIZATION OR COPOLYMERIZATION OF ETHYLENE IN AN INERT SOLVENT IN THE PRESENCE OF A CATALYST COMPRISING A TITANIUM OR VANADIUM HALOGEN COMPOUND CHEMICALLY BONDED ONTO THE SURFACE OF INORGANIC SOLID PARTICLES, AND AN ORGANOALUMINUM COMPOUND OR A DIALKYL ZINC, THE IMPROVEMENT WHEREIN THE INORGANIC SOLID PARTICLES ARE PARTICLES OF MAGNESIUM HYDROXIDE HAVING AN AVERAGE PARTICLE DIAMETER EXCEEDING 1U BUT NOT GREATER THAN 70U, AND A SPECIFIC SURFACE AREA IN THE RANGE OF FROM 20 TO 100 M.2/G.
Inventors
- 👤 N Kashiwa
- 👤 T Tokuzumi
- 👤 H Fujimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:43
CPC Classifications
C; C08; C08F; C08F10/00; C08F10/02; Y; Y10; Y10S; Y10S526/00; Y10S526/908
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) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |