US2849429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtration and catalyst regeneration in olefin polymerization
Assignee: Phillips Petroleum Co
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Filing: 1955-05-02
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Granted: 1958-08-26
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Expires: 1975-05-02
Abstract
No abstract record available.
Inventors
- 👤 Martin R Cines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:38
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584; Y10; Y10S; Y10S159/00; Y10S159/10; Y10S526/00; Y10S526/908
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
IN A PROCESS WHEREIN OLEFINS ARE POLYMERIZED IN THE PRESENCE OF A PARTICULATE SOLID CATALYST IN A SOLVENT SLURRY THE IMPROVEMENT COMPRISING ADDING A FILTER AID TO THE SLURRY AFTER POLYMERIZATION, FILTERING A RESULTING SLURRY RECOVERING A RESULTING FILTER CAKE, REGENERATING CATALYST CONTAINED IN SAID FILLER CAKE, SEPARATING CATALYST FINES AND SUFFICIENT FILTER AID TO PREVENT CONTINUAL BUILDUP OF USED FILTER AID AND THE CATALYST AND RETURNING REGENERATED AND RESUABLE CATALYST TO THE POLYMERIZATION ZONE.
Claim 2
Dependent Claim
75 words
IN A PROCESS WHEREIN OLEFINS ARE POLYMERIZED IN THE PRESENCE OF A PARTICULATE SOLID CATALYST IN A SOLVENT SLURRY THE IMPROVEMENT COMPRISING ADDING A FILTER AID TO THE SLURRY AFTER POLYMERIZATION, FILTERING A RESULTING SLURRY RECOVERING A RESULTING FILTER CAKE, REGENERATING CATALYST CONTAINED IN SAID FILLER CAKE, SEPARATING CATALYST FINES AND SUFFICIENT FILTER AID TO PREVENT CONTINUAL BUILDUP OF USED FILTER AID AND THE CATALYST AND RETURNING REGENERATED AND RESUABLE CATALYST TO THE POLYMERIZATION ZONE.
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) | 1961-08-25 | 1962-02-24 | 1962-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-25 | 1966-02-24 | 1966-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-25 | 1970-02-24 | 1970-08-26 | $7700.00 | Window Closed / Lapsed |