Patent US3725377A successfully refreshed from Google Patents.
US3725377A
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US
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Process for polymerizing 1-3-butadiene monomer
Assignee: Phillips Petroleum Co
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Filing: 1970-05-11
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Granted: 1973-04-03
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Expires: 1990-05-11
Abstract
Abstract A process for polymerization of monomers containing ethylenic unsaturation including contacting the polymerization feed stock stream with an adsorbent material, and periodically regenerating the adsorbent material with purified separated nonpolymerizable hydrocarbons separated from the feed stock stream after effectuation of the polymerization step.
Inventors
- 👤 J Cottle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:59
CPC Classifications
C; C08; C08F; C08F10/00; C07; C07C; C07C7/00; C07C7/005; C08F36/00; C08F36/02; C08F36/04; Y; Y10; Y10S; Y10S526/00; Y10S526/912
Claims Analysis
Total Claims: 0
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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) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |