US2735876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conversion of gaseoos- hydrocarbons
Assignee: —
•
Filing: —
•
Granted: 1956-02-21
•
Expires: 1973-02-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:09
CPC Classifications
C; C07; C07C; C07C4/00; C07C4/08; C07C4/10; C07C2/00; C07C4/02; C07C4/04; C07C5/00; C07C5/32; C07C5/327
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
A PROCESS FOR CONVERTING A GASEOUS HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF ETHANE, PROPANE, PROPYLENE AND MIXTURES THEREOF TO ETHYLENE AND A LIQUID AROMATIC FRACTION WHICH COMPRISES INTRODUCING SAID HYDROCARBON AT A TEMPERATURE FROM ATMOSPHERIC TO 800* F. INTO CRACKING TUBES CONSTRUCTED OF NICKEL-FREE CHROME STEEL AND HAVING A RELATIONSHIP OF SURFACE AREA TO VOLUME OF FREE SPACE ABOVE 200 SQUARE FEET PER CUBIC FOOT, PASSING SAID HYDROCARBON THROUGH SAID TUBES AT A PRESSURE BELOW 50 P. S. I. G. AND AT A RATE SUCH THAT A CONTACT TIME OF 0.5 TO 2 SECONDS IS OBTAINED, RAISING SAID GASEOUS HYDROCARBON TO A TEMPERATURE LEVEL OF 1350 TO 1550* F. DURING PASSAGE THROUGH SAID CRACKING TUBES, REMOVING AN EFFLUENT GAS FROM SAID CRACKING TUBES AT A TEMPERATURE BETWEEN 1350 AND 1550*F., PASSING SAID EFFLUENT GAS IMMEDIATELY THROUGH A SOAKER AT A RATE AT SUCH THAT A RESIDENCE TIME OF 10
Claim 2
Dependent Claim
150 words
A PROCESS FOR CONVERTING A GASEOUS HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF ETHANE, PROPANE, PROPYLENE AND MIXTURES THEREOF TO ETHYLENE AND A LIQUID AROMATIC FRACTION WHICH COMPRISES INTRODUCING SAID HYDROCARBON AT A TEMPERATURE FROM ATMOSPHERIC TO 800* F. INTO CRACKING TUBES CONSTRUCTED OF NICKEL-FREE CHROME STEEL AND HAVING A RELATIONSHIP OF SURFACE AREA TO VOLUME OF FREE SPACE ABOVE 200 SQUARE FEET PER CUBIC FOOT, PASSING SAID HYDROCARBON THROUGH SAID TUBES AT A PRESSURE BELOW 50 P. S. I. G. AND AT A RATE SUCH THAT A CONTACT TIME OF 0.5 TO 2 SECONDS IS OBTAINED, RAISING SAID GASEOUS HYDROCARBON TO A TEMPERATURE LEVEL OF 1350 TO 1550* F. DURING PASSAGE THROUGH SAID CRACKING TUBES, REMOVING AN EFFLUENT GAS FROM SAID CRACKING TUBES AT A TEMPERATURE BETWEEN 1350 AND 1550*F., PASSING SAID EFFLUENT GAS IMMEDIATELY THROUGH A SOAKER AT A RATE AT SUCH THAT A RESIDENCE TIME OF 10
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) | 1959-02-20 | 1959-08-22 | 1960-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-20 | 1963-08-22 | 1964-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-20 | 1967-08-22 | 1968-02-21 | $7700.00 | Window Closed / Lapsed |