US2945016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of polymers
Assignee: Phillips Petroleum Co
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Filing: 1956-02-27
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Granted: 1960-07-12
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Expires: 1976-02-27
Abstract
No abstract record available.
Inventors
- 👤 Bruce C Benedict
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:30
CPC Classifications
C; C08; C08F; C08F6/00; C08F6/06; C08F6/12; Y; Y10; Y10S; Y10S159/00; Y10S159/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A PROCESS FOR FRACTIONATING A NORMALLY SOLID POLYMER OF AN ALIPHATIC 1-OLEFIN TO OBTAIN AT LEAST TWO FRACTIONS WHICH DIFFER FROM EACH OTHER IN PHYSICAL PROPERTIES WHICH COMPRISES CONTACTING A SOLUTION OF SAID POLYMER IN A NAPHTHENIC HYDROCARBON HAVING FROM 5 TO 6 CARBON ATOMS IN NAPHTHENIC RING WITH A PARAFFINIC HYDROCARBON CONTAINING UP TO AND INCLUDING 16 CARBON ATOMS PER MOLECULE, SAID CONTACTING OCCURING AT A TEMPERATURE AT LEAST AS HIGH AS THE UPPER CLOUD POINT OF THE SOLUTION OF SAID POLYMER IN SAID NAPHTHENIC AND PARAFFINIC HYDROCARBONS, THEREBY CAUSING THE FORMATION OF A POLYMER-RICH PHASE AND A SOLVENT-RICH PHASE, AND SEPARATELY RECOVERING SAID PHASES.
Claim 2
Dependent Claim
106 words
A PROCESS FOR FRACTIONATING A NORMALLY SOLID POLYMER OF AN ALIPHATIC 1-OLEFIN TO OBTAIN AT LEAST TWO FRACTIONS WHICH DIFFER FROM EACH OTHER IN PHYSICAL PROPERTIES WHICH COMPRISES CONTACTING A SOLUTION OF SAID POLYMER IN A NAPHTHENIC HYDROCARBON HAVING FROM 5 TO 6 CARBON ATOMS IN NAPHTHENIC RING WITH A PARAFFINIC HYDROCARBON CONTAINING UP TO AND INCLUDING 16 CARBON ATOMS PER MOLECULE, SAID CONTACTING OCCURING AT A TEMPERATURE AT LEAST AS HIGH AS THE UPPER CLOUD POINT OF THE SOLUTION OF SAID POLYMER IN SAID NAPHTHENIC AND PARAFFINIC HYDROCARBONS, THEREBY CAUSING THE FORMATION OF A POLYMER-RICH PHASE AND A SOLVENT-RICH PHASE, AND SEPARATELY RECOVERING SAID PHASES.
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) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |