Patent JPS6237903A successfully refreshed from Google Patents.
Patent US3812089A successfully refreshed from Google Patents.
US3812089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of olefin polymers
Assignee: Mitsubishi Chemical Corp
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Filing: 1970-12-21
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Granted: 1974-05-21
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Expires: 1990-12-21
Abstract
Abstract AT LEAST ONE OLEFIN IS POLYMERIZED BY CONTACT WITH A CATALYST COMPRISING A COMBINATION OF (1) A REACTION PRODUCT INSOLUBLE IN HYDROCARBONS, PREPARED BY REACTING THE TWO ESSENTIALLY COMPONENTS OF A ZIEGLER-TYPE CATALYST AND AT LEAST ONE METAL HALIDE COMPOUND AND (2) AN ORGANIC METAL COMPOUND OF A METAL OF GROUP I, II, OR III OF THE PERIODIC TABLE. THE ABOVE METAL HALIDE COMPOUND IS A HALIDE OF LI,K,CA,FE,GA,ZR,MO,RH,AG,SN,SB,BA, LA,CE,HF,AU,TL, OR TH.
Inventors
- 👤 K Tashiro
- 👤 M Yokoyama
- 👤 S Kitazume
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:04
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) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |