Patent US2899475A successfully refreshed from Google Patents.
US2899475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal cracking process with an improved
Assignee: —
•
Filing: —
•
Granted: 1959-08-11
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Expires: 1976-08-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:01
CPC Classifications
C; C10; C10G; C10G9/00; C10G9/002
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
126 words
A PROCESS FOR PRODUCING ETHYLENE WHICH COMPRISES HEATING A HYDROCARBON FEED STREAM TO VAPORIZE AT LEAST A PORTION OF THE STREAM, FURTHER HEATING THE STREAM TO EFFECT THERMAL CRACKING OF A SUBSTANTIAL PORTION OF THE STREAM, TO PRODUCE A SUBSTANTIAL QUANTITY OF ETHYLENE, ADDING WATER TO THE CRACKED STREAM TO COOL SAME TO ABOUT 900* F., THEN DIRECTLY PASSING THE RESULTING COOLED CRACKED STREAM IN CONTACT WITH A COOLED HYDROCARBON QUENCH OIL AND THEREBY SCRUBBING TARS FROM SAID CRACKES STREAM WHILE ALSO COOLING SAID STREAM TO ABOUT 180* F., SAID TEMPERATURE BEING ABOVE THE DEW POINT SO THAT WATER IS NOT CONDENSED PASSING THE RESULTING COOLED CRACKED STREAM TO A HEATED ABSORBING ZONE, CONTACTING THE COOLED CRACKED STREAM IN THE ABSORBING ZONE WITH A LEAN ABSORBING
References Cited (Backward Citations)
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US2498806A
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US2621216A
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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) | 1962-08-10 | 1963-02-09 | 1963-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-10 | 1967-02-09 | 1967-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-10 | 1971-02-09 | 1971-08-11 | $7700.00 | Window Closed / Lapsed |