Patent US2959626A successfully refreshed from Google Patents.
US2959626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of styrenegrade ethyl benzene
Assignee: Cosden Petroleum Corp
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Filing: 1957-07-15
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Granted: 1960-11-08
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Expires: 1977-07-15
Abstract
No abstract record available.
Inventors
- 👤 Dan M Krausse
- 👤 George A Randall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:28
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/005; C07C7/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
THE METHOD OF SEPARATING ETHYLBENZENE FROM A MIXTURE WITH XYLENE ISOMERS CONTAINED IN A HYDROCARBON MIXTURE WHICH CONTAIN OTHER HYDROCARBON COMPONENTS COMPRISING FIRST FORMING OF SAID HYDROCARBON MIXTURE A CONCENTRATE FRACTION OF SAID C8 HYDROCARBONS FROM WHICH THE STABLE NON-AROMATIC HYDROCARBONS BOILING IN THE
Claim 2
Independent Claim
44 words
THE METHOD OF SEPARATING ETHYLBENZENE FROM A MIXTURE WITH XYLENE ISOMERS CONTAINED IN A HYDROCARBON MIXTURE WHICH CONTAIN OTHER HYDROCARBON COMPONENTS COMPRISING FIRST FORMING OF SAID HYDROCARBON MIXTURE A CONCENTRATE FRACTION OF SAID C8 HYDROCARBONS FROM WHICH THE STABLE NON-AROMATIC HYDROCARBONS BOILING IN THE
References Cited (Backward Citations)
GB625570A
Cited
US2734930A
Cited
US1955246A
Cited
US2295256A
Cited
US2407820A
Cited
US2773918A
Cited
US2770663A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-08 | 1964-05-09 | 1964-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-08 | 1968-05-09 | 1968-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-08 | 1972-05-09 | 1972-11-08 | $7700.00 | Window Closed / Lapsed |