US2986588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propylene dimerization
Assignee: California Research LLC
•
Filing: 1957-09-27
•
Granted: 1961-05-30
•
Expires: 1977-09-27
Abstract
No abstract record available.
Inventors
- 👤 Richard M Schramm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:59
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/24; C07C2523/00; C07C2523/02; C07C2523/04; C07C2527/00; C07C2527/20; C07C2527/232
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A PROCESS FOR DIMERIZING PROPYLENE CONSISTING OF CONTACTING IN A CATALYTIC POLYMERIZATION ZONE, A NORMALLY GASEOUS PROPYLENE-CONTAINING FEED SUBSTANTIALLY FREE FROM OLEFINS OTHER THAN PROPYLENE, WITH A CATALYST CONSISTING ESSENTIALLY OF AN ALKALI METAL SELECTED FROM THE GROUP CONSISTING OF POTASSIUM, RUBIDIUM AND CESIUM AT A TEMPERATURE IN THE RANGE OF ABOUT 100*F. TO ABOUT 400* F. AND A PRESSURE NOT GREATER THAN ABOUT 100 ATMOSPHERES, AND REMOVING A REACTION PRODUCT FROM SAID ZONE, THE HEXENE FRACTION OF SAID REACTION PRODUCT BEING PRINCIPALLY 4-METHYLPENTENE-1.
Claim 2
Dependent Claim
84 words
A PROCESS FOR DIMERIZING PROPYLENE CONSISTING OF CONTACTING IN A CATALYTIC POLYMERIZATION ZONE, A NORMALLY GASEOUS PROPYLENE-CONTAINING FEED SUBSTANTIALLY FREE FROM OLEFINS OTHER THAN PROPYLENE, WITH A CATALYST CONSISTING ESSENTIALLY OF AN ALKALI METAL SELECTED FROM THE GROUP CONSISTING OF POTASSIUM, RUBIDIUM AND CESIUM AT A TEMPERATURE IN THE RANGE OF ABOUT 100*F. TO ABOUT 400* F. AND A PRESSURE NOT GREATER THAN ABOUT 100 ATMOSPHERES, AND REMOVING A REACTION PRODUCT FROM SAID ZONE, THE HEXENE FRACTION OF SAID REACTION PRODUCT BEING PRINCIPALLY 4-METHYLPENTENE-1.
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) | 1964-05-29 | 1964-11-28 | 1965-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-29 | 1968-11-28 | 1969-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-29 | 1972-11-28 | 1973-05-30 | $7700.00 | Window Closed / Lapsed |