US3265590A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method of fractionation of ethyl benzene
Assignee: Badger Co Inc
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Filing: 1964-06-23
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Granted: 1966-08-09
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Expires: 1984-06-23
Abstract
No abstract record available.
Inventors
- 👤 Aaron K Redcay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:22
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/04; Y; Y10; Y10S; Y10S585/00; Y10S585/919; Y10S585/921
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A METHOD OF SEPARATING A MIXTURE OF ETHYL BENZENE AND ORTHO, META AND PARA XYLENES COMPRISING DISTILLING SAID MIXTURE UNDER AT LEAST 2 P.S.I.G. PRESSURE AND A TEMPERATURE OF AT LEAST 286* F. IN A MULTI-STAGE COLUMN, REFLUXING SAID MIXTURE AT A RATIO OF FROM 38 TO 350:1, WHEREBY SAID MIXTURE SEPARATES INTO AN OVERHEAD FRACTION OF STYRENE GRADE ETHYL BENZENE AND A BOTTOM FRACTION, PASSING SAID OVERHEAD FRACTION FROM SAID COLUMN THROUGH A HEAT EXCHANGER, AND GENERATING STEAM AT A PRESSURE OF AT LEAST 20. P.S.I.G.
Claim 2
Independent Claim
87 words
A METHOD OF SEPARATING A MIXTURE OF ETHYL BENZENE AND ORTHO, META AND PARA XYLENES COMPRISING DISTILLING SAID MIXTURE UNDER AT LEAST 2 P.S.I.G. PRESSURE AND A TEMPERATURE OF AT LEAST 286* F. IN A MULTI-STAGE COLUMN, REFLUXING SAID MIXTURE AT A RATIO OF FROM 38 TO 350:1, WHEREBY SAID MIXTURE SEPARATES INTO AN OVERHEAD FRACTION OF STYRENE GRADE ETHYL BENZENE AND A BOTTOM FRACTION, PASSING SAID OVERHEAD FRACTION FROM SAID COLUMN THROUGH A HEAT EXCHANGER, AND GENERATING STEAM AT A PRESSURE OF AT LEAST 20. P.S.I.G.
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) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |