US3637627A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Olefin polymers and method for producing same
Assignee: Phillips Petroleum Co
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Filing: 1967-05-03
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Granted: 1972-01-25
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Expires: 1987-05-03
Abstract
Abstract ACYCLIC OLEFINIC MONOMERS CONTAINING 3 TO ABOUT 20 CARBON ATOMS PER MOLECULE ARE CONVERTED INTO ETHYLENEPROPYLENE COPOLYMERS BY CONTACT WITH A CATALYST SYSTEM COMPRISING A COORDINATION COMPLEX OF A TRANSITION METAL OR A TRANSITION METAL INORGANIC COMPOUND ASSOCIATED WITH A DIFFICULTY REDUCIBLE METAL OXIDE OR PHOSPHATE; A GROUP IV-B OR V-B METAL COMPOUND; AND AN ORGANOALUMINUM DIHALIDE OR ORGANOALUMINUM SESQUIHALIDE.
Inventors
- 👤 James N Short
- 👤 Robert P Zelinski
- 👤 Rudolf H Gaeth
- 👤 Ernest A Zuech
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:39
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) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |