US2635709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adsorption of olefins by petroleum coke
Assignee: Standard Oil Development Co
•
Filing: 1949-08-22
•
Granted: 1953-04-21
•
Expires: 1969-08-22
Abstract
No abstract record available.
Inventors
- 👤 Francis M Archibald
- 👤 William A Konrad
- 👤 Roy E D Haney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:33
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
A PROCESS FOR THE SEPARATION OF ETHYLENE FROM A MIXTURE COMPRISING ETHYLENE AND PROPANE WHICH COMPRISES CONTACTING THE MIXTURE WITH A COKE PREPARED BY CALCINING A SULFURIC ACIDPETROLEUM WHEREBY THE ETHYLENE IS SELECTIVELY ADSORBED AND THEREAFTER RECOVERING ETHYLENE FROM THE PETROLEUM COKE.
Claim 2
Dependent Claim
42 words
A PROCESS FOR THE SEPARATION OF ETHYLENE FROM A MIXTURE COMPRISING ETHYLENE AND PROPANE WHICH COMPRISES CONTACTING THE MIXTURE WITH A COKE PREPARED BY CALCINING A SULFURIC ACIDPETROLEUM WHEREBY THE ETHYLENE IS SELECTIVELY ADSORBED AND THEREAFTER RECOVERING ETHYLENE FROM THE PETROLEUM COKE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-20 | 1956-10-20 | 1957-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-20 | 1960-10-20 | 1961-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-20 | 1964-10-20 | 1965-04-21 | $7700.00 | Window Closed / Lapsed |