Patent US3813650A successfully refreshed from Google Patents.
Patent US3595849A successfully refreshed from Google Patents.
US3595849A
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US
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Polymerization catalyst of alpha-olefins
Assignee: Mitsubishi Chemical Corp
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Filing: 1968-02-29
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Granted: 1971-07-27
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Expires: 1988-02-29
Abstract
Abstract AN IMPROVED POLYMERIZATION CATALYST FOR A-OLEFINS FORMED BY MIXING A HALIDE OF A TRANSITION METAL HAVING A LOWER VALENCY THAN THE MAXIMUM VALENCY, AN ORGANOALUMINUM COMPOUND, AND AN AION EXCHANGE RESIN.
Inventors
- 👤 Senji Nakano
- 👤 Toshinobu Watanabe
- 👤 Takehisa Okawa
- 👤 Masamitsu Murayama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:15
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/907
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) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |