Patent US2945076A successfully refreshed from Google Patents.
US2945076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing olefins
Assignee: Gulf Research and Development Co
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Filing: 1957-04-15
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Granted: 1960-07-12
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Expires: 1977-04-15
Abstract
No abstract record available.
Inventors
- 👤 William A Pardee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:14
CPC Classifications
C; C07; C07C; C07C11/00; C07C11/02; C10; C10G; C10G9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A METHOD FOR PRODUCING NORMAL ALPHA-OLEFINS WHICH COMPRISES VAPORIZING A WAXY CHARGE BY ADMIXING THEREWITH AT LEAST ABOUT 2 PERCENT BY WEIGHT OF STEAM AT A TEMPERATURE OF ABOUT 900* TO ABOUT 1200*F., HEATING THE RESULTING MIXTURE AT A TEMPERATURE OF ABOUT 1000* TO ABOUT 1250*F. AND A PRESSURE OF ABOUT ONE TO ABOUT THREE ATMOSPHERES FOR ABOUT 0.2 TO ABOUT 6.0 SECONDS, WHEREBY THE WAX CHARGE IS CRACKED AND A MIXTURE PREDOMINATING IN NORMAL ALPHA-OLEFINS IS PRODUCED, COOLING SAID LATTER MIXTURE TO A TEMPERATURE OF ABOUT 600* TO ABOUT 800*F. IN LESS THAN ABOUT 3 SECONDS, PASSING SAID COOLED MIXTURE INTO A FLASH TOWER, SEPARATING AND REMOVING A LIGHT HYDROCARBON FRACTION FROM SAID FLASH TOWER, REMOVING THE REMAINDER OF SAID COOLED MIXTURE
Claim 2
Independent Claim
123 words
A METHOD FOR PRODUCING NORMAL ALPHA-OLEFINS WHICH COMPRISES VAPORIZING A WAXY CHARGE BY ADMIXING THEREWITH AT LEAST ABOUT 2 PERCENT BY WEIGHT OF STEAM AT A TEMPERATURE OF ABOUT 900* TO ABOUT 1200*F., HEATING THE RESULTING MIXTURE AT A TEMPERATURE OF ABOUT 1000* TO ABOUT 1250*F. AND A PRESSURE OF ABOUT ONE TO ABOUT THREE ATMOSPHERES FOR ABOUT 0.2 TO ABOUT 6.0 SECONDS, WHEREBY THE WAX CHARGE IS CRACKED AND A MIXTURE PREDOMINATING IN NORMAL ALPHA-OLEFINS IS PRODUCED, COOLING SAID LATTER MIXTURE TO A TEMPERATURE OF ABOUT 600* TO ABOUT 800*F. IN LESS THAN ABOUT 3 SECONDS, PASSING SAID COOLED MIXTURE INTO A FLASH TOWER, SEPARATING AND REMOVING A LIGHT HYDROCARBON FRACTION FROM SAID FLASH TOWER, REMOVING THE REMAINDER OF SAID COOLED MIXTURE
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) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |