US2719183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isomerization of xylenes
Assignee: Houdry Process Corp
•
Filing: 1952-07-02
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Granted: 1955-09-27
•
Expires: 1972-07-02
Abstract
No abstract record available.
Inventors
- 👤 Edward R Boedeker
- 👤 William E Erner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:53
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/22; C07C5/27; C07C5/2702; C07C5/2705
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
THE PROCESS FOR THE ISOMERIZATION OF ALKYL AROMATIC HYDROCARBONS OF THE BENZENE SERIES ABOVE TOLUENE, COMPRISING PASSING THE CHARGE STOCK COMPRISING SUCH HYDROCARBONS OVER AN ISOMERIZATION CATALYST UNDER OPERATING CONDITIONS INCLUDING ELEVATED TEMPERATURE AND PRESSURE NO HIGHER THAN 0.5 ATMOSPHERE.
Claim 2
Dependent Claim
40 words
THE PROCESS FOR THE ISOMERIZATION OF ALKYL AROMATIC HYDROCARBONS OF THE BENZENE SERIES ABOVE TOLUENE, COMPRISING PASSING THE CHARGE STOCK COMPRISING SUCH HYDROCARBONS OVER AN ISOMERIZATION CATALYST UNDER OPERATING CONDITIONS INCLUDING ELEVATED TEMPERATURE AND PRESSURE NO HIGHER THAN 0.5 ATMOSPHERE.
References Cited (Backward Citations)
US2403757A
Cited
US2515237A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-09-26 | 1959-03-28 | 1959-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-26 | 1963-03-28 | 1963-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-26 | 1967-03-28 | 1967-09-27 | $7700.00 | Window Closed / Lapsed |