US2976272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Olefin polymerization using a transition metal halide and a reduced aromatic hydrocarbon as catalyst
Assignee: Eastman Kodak Co
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Filing: 1959-02-17
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Granted: 1961-03-21
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Expires: 1979-02-17
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry W Coover
- 👤 Jr Willis C Wooten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:03
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
68 words
IN THE POLYMERIZATION OF A-MONOOLEFINIC HYDROCARBON MATERIAL TO FORM SOLID CRYSTALLINE POLYMER, THE IMPROVEMENT WHICH COMPRISES POLYMERIZING THE A-MONOOLEFINIC HYDROCARBON MATERIAL IN THE PRESENCE OF A CATALYTIC MIXTURE CONSISTING ESSENTIALLY OF A HALIDE OF A TRANSITION METAL SELECTED FROM THE GROUP CONSISTING OF TITANIUM AND VANADIUM AND A BIS-DIHYDRO UNSATURATED AROMATIC HYDROCARBON, THE MOLAR RATIO OF HALIDE TO AROMATIC HYDROCARBON BEING WITHIN THE RANGE OF 1:0.25 TO 1:4.
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) | 1964-03-20 | 1964-09-19 | 1965-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-20 | 1968-09-19 | 1969-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-20 | 1972-09-19 | 1973-03-21 | $7700.00 | Window Closed / Lapsed |