Patent US2564388A successfully refreshed from Google Patents.
US2564388A
Expired / Lapsed
US
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Isomerization of xylenes
Assignee: Shell Development Co
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Filing: 1950-01-09
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Granted: 1951-08-14
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Expires: 1970-01-09
Abstract
No abstract record available.
Inventors
- 👤 Clarence S Bennett
- 👤 Jr William A Bailey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:32
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/22; C07C5/27; C07C5/2729; C07C5/2732; Y; Y10; Y10S; Y10S585/00; Y10S585/949; Y10S585/952
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
THE PROCESS FOR THE ISOMERIZATION OF XYLENES WHICH COMPRISES CONTACTING A XYLENE WITH FROM 0.2 MOLE TO 6 MOLES PER MOLE OF XYLENE OF A GAS SELECTED FROM THE GROUP CONSISTING OF STEAM AND HYDROGEN AT A TEMPERATURE BETWEEN ABOUT 800* F. AND ABOUT 1100* F. AND AT A LIQUID HOURLY SPACE VELOCITY BETWEEN ABOUT 1 AND ABOUT 16 AND ABOVE THAT AFFORDING SUBSTANTIAL DISPROPORTIONATION IN THE PRESENCE OF A CLAY-TYPE CRACKING CATALYST.
Claim 2
Dependent Claim
73 words
THE PROCESS FOR THE ISOMERIZATION OF XYLENES WHICH COMPRISES CONTACTING A XYLENE WITH FROM 0.2 MOLE TO 6 MOLES PER MOLE OF XYLENE OF A GAS SELECTED FROM THE GROUP CONSISTING OF STEAM AND HYDROGEN AT A TEMPERATURE BETWEEN ABOUT 800* F. AND ABOUT 1100* F. AND AT A LIQUID HOURLY SPACE VELOCITY BETWEEN ABOUT 1 AND ABOUT 16 AND ABOVE THAT AFFORDING SUBSTANTIAL DISPROPORTIONATION IN THE PRESENCE OF A CLAY-TYPE CRACKING CATALYST.
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) | 1954-08-13 | 1955-02-12 | 1955-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-13 | 1959-02-12 | 1959-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-13 | 1963-02-12 | 1963-08-14 | $7700.00 | Window Closed / Lapsed |