US2494510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of propylene in the presence of isobutane
Assignee: Polymerization Process Corp
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Filing: 1946-09-20
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Granted: 1950-01-10
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Expires: 1966-09-20
Abstract
No abstract record available.
Inventors
- 👤 Everett C Hughes
- 👤 Harrison M Stine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:21
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/14; C07C2/18; C07C2527/00; C07C2527/14; C07C2527/16; C07C2527/167; C07C2527/173
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
75 words
A PROCESS OF POLYMERIZING PROPYLENE TO FORM NORMALLY LIQUID HYDROCARBONS USEFUL AS A MOTOR FUEL COMPONENT, WHICH COMPRISES CONTACTING PROPYLENE, IN THE PRESENCE OF ISOBUTANE AND SUBSTANTIALLY FREE OF BUTYLENE, WITH A COPPER PYROPHOSPHATE POLYMERIZATION CATALYST AT A TEMPERATURE BETWEEN ABOUT 350* AND 500*F. AND A PRESSURE BETWEEN ABOUT 200 AND 1500 POUNDS PER SQUARE INCH TO FORM NORMALLY LIQUID OLEFINIC POLYMERS AS THE PRIMARY REACTION PRODUCT OF THE PROPYLENE, SAID ISOBUTANE BEING SUBSTANTIALLY UNREACTED.
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) | 1953-01-09 | 1953-07-11 | 1954-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-09 | 1957-07-11 | 1958-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-09 | 1961-07-11 | 1962-01-10 | $7700.00 | Window Closed / Lapsed |