Patent US3179580A successfully refreshed from Google Patents.
US3179580A
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Method for polymerizing olefins and catalyst composition therefor
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1961-05-05
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Granted: 1965-04-20
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Expires: 1981-05-05
Abstract
No abstract record available.
Inventors
- 👤 Fukui Kenichi
- 👤 Nakamura Joji
- 👤 Yuasa Sachio
- 👤 Shimizu Takeo
- 👤 Sano Takezo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:07
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A METHOD FOR POLYMERIZING OLEFINS, COMPRISING CONTACTING AN OLEFIN WITH A CATALYST COMPOSITION COMPRISING (A) A SUBSTANCE OF THE COMPOSITION REPRESENTED BY THE FORMULA (MEO2.(P2O5)X) WHEREIN ME IS A METAL SELECTED FROM THE GROUP CONSISTING OF TITANIUM, ZIRCONIUM, HAFNIUM AND THORIUM, AND X IS A NUMBER OF NOT MORE THAN 2.0, AND (B) AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF HYDRIDES AND ORGANOMETALLIC COMPOUNDS OF ALKALI METALS, ALKALINE EARTH METALS, ZINC, CADMIUM, MERCURY, EARTH METALS AND RARE EARTH METALS, SAID OLEFIN BEING AN UNSATURATED HYDROCARBON HAVING 2 TO 5 CARBON ATOMS AND HAVING AT LEAST ONE POLYMERIZABLE ETHYLENE DOUBLE BOND.
Claim 2
Dependent Claim
29 words
A METHOD ACCORDING TO THE CLAIM 6, WHEREIN THE CONTACT OF THE OLEFIN WITH THE CATALYST COMPOSITION IS CARRIED OUT WHILE THE REACTION SYSTEM IS EXPOSED TO IONIZING RADIATION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-19 | 1968-10-19 | 1969-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-19 | 1972-10-19 | 1973-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-19 | 1976-10-19 | 1977-04-20 | $7700.00 | Window Closed / Lapsed |