US2881129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cracking of hydrocarbons
Assignee: —
•
Filing: —
•
Granted: 1959-04-07
•
Expires: 1976-04-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:03
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
129 words
A METHOD OF CRACKING HYDROCARBONS BOILING IN THE RANGE FROM 400* TO 750* F. WHICH COMPRISES VAPORIZING SAID HYDROCARBONS, FORMING A SUSPENSION OF A FINELY DIVIDED SILICA-ALUMINA CRACKING CATALYST HAVING A SPECIFIC GRAVITY IN THE RANGE BETWEEN ABOUT 1.6 AND ABOUT 2.73 IN SAID VAPORIZED HYDROCARBONS AT A TEMPERATURE IN THE RANGE BETWEEN 800* AND 1100* F., ONE OF THE COMPONENTS OF SAID SUSPENSION HAVING ITS DIRECTION OF FLOW CHANGED IMMEDIATELY PRIOR TO BEING FORMED INTO SAID SUSPENSION, ADDING TO SAID SUSPENSION A LIQUID STREAM OF HYDROCARBONS OBTAINED FROM A LATER STAGE IN THE PROCESS, FLOWING SAID SUSPENSION AT A TEMPERATURE IN THE RANGE BETWEEN 800* AND 1100* F. AT A GAS VELOCITY IN THE RANGE BETWEEN ABOUT 8 AND ABOUT 50 FEET PER SECOND THROUGH A VERTICAL ELON-
References Cited (Backward Citations)
US2374073A
Cited
US2312230A
Cited
US2378542A
Cited
US2396109A
Cited
US2427341A
Cited
US2487065A
Cited
US2766184A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-06 | 1962-10-06 | 1963-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-06 | 1966-10-06 | 1967-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-06 | 1970-10-06 | 1971-04-07 | $7700.00 | Window Closed / Lapsed |