US2798889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of aromatics
Assignee: Shell Development Co
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Filing: 1955-02-18
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Granted: 1957-07-09
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Expires: 1975-02-18
Abstract
No abstract record available.
Inventors
- 👤 Waterman Hein Israel
- 👤 Klinkenberg Jan Willem
- 👤 Oelderik Jan Marinus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:41
CPC Classifications
C; C08; C08F; C08F10/00; C07; C07C; C07C2/00; C07C2521/00; C07C2521/06; C07C2521/08; C07C2523/00; C07C2523/16; C07C2523/24; C07C2523/30; C07C2527/00; C07C2527/14; C07C2527/186; C07C2527/188
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A PROCESS FOR THE MANUFACTURE OF AROMATICS BOILING BETWEEN THE BOILING RANGES OF GASOLINE AND LUBRICATING OIL WHICH COMPRISES CONTACTING ETHENE WITH A CATALYST SELECTED FROM THE GROUP CONSISTING OF SILICO-TUNGSTIC ACID AND PHOSPHO-TUNGSTIC ACID, SUPPORTED ON A SOLID CARRIER SUBSTANTIALLY FREE FROM ALKALINE COMPONENTS, THE WEIGHT RATIO OF SAID CATALYST TO SAID SOLID CARRIER BEING FROM 10:90 TO 50:50 SAID CONTACTING BEING CARRIED OUT AT A TEMPERATURE BETWEEN 220*C. AND ABOUT 300*C. AND AT A TOTAL PRESSURE OF AT LEAST 50 ATMOSPHERES ABSOLUTE.
Claim 2
Dependent Claim
84 words
A PROCESS FOR THE MANUFACTURE OF AROMATICS BOILING BETWEEN THE BOILING RANGES OF GASOLINE AND LUBRICATING OIL WHICH COMPRISES CONTACTING ETHENE WITH A CATALYST SELECTED FROM THE GROUP CONSISTING OF SILICO-TUNGSTIC ACID AND PHOSPHO-TUNGSTIC ACID, SUPPORTED ON A SOLID CARRIER SUBSTANTIALLY FREE FROM ALKALINE COMPONENTS, THE WEIGHT RATIO OF SAID CATALYST TO SAID SOLID CARRIER BEING FROM 10:90 TO 50:50 SAID CONTACTING BEING CARRIED OUT AT A TEMPERATURE BETWEEN 220*C. AND ABOUT 300*C. AND AT A TOTAL PRESSURE OF AT LEAST 50 ATMOSPHERES ABSOLUTE.
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) | 1960-07-08 | 1961-01-07 | 1961-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-08 | 1965-01-07 | 1965-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-08 | 1969-01-07 | 1969-07-09 | $7700.00 | Window Closed / Lapsed |