US2762790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of aliphatic conjugated diolefins
Assignee: Standard Oil Co
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Filing: 1952-12-26
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Granted: 1956-09-11
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Expires: 1972-12-26
Abstract
No abstract record available.
Inventors
- 👤 Charles R Greene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:50
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04; Y; Y10; Y10S; Y10S260/00; Y10S260/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A PROCESS FOR POLYMERIZING AN ALIPHATIC CONJUGATED DIOLEFIN, WHICH PROCESS COMPRISES CONTACTING SAID ALIPHATIC CONJUGATED DIOLEFIN IN THE PRESENCE OF A LIQUID HYDROCARBON REACTION MEDIUM WITH CATALYTICALLY EFFECTIVE AMOUNTS OF THE HYDRIDE OF AN ALKALINE EARTH METAL AND AN OXIDE OF A METAL OF GROUP 6A OF THE MENDELEEF PERIODIC TABLE, THE RATIO OF SAID HYDRIDE TO METAL OXIDE CARALYST BEING BETWEEN ABOUT 0.1 AND ABOUT 5 BY WEIGHT, AT A POLYMERIZATION REACTION TEMPERATURE BETWEEN ABOUT 100* C. AND ABOUT 300* C. UNDER A PRESSURE SUFFICIENT TO MAINTAIN A LIQUID PHASE, FOR A PERIOD OF TIME SUFFICIENT TO EFFECT SUBSTAINIAL POLYMERIZATION OF SAID ALIPHATIC CONJUGATED DIOLEFIN, AND SEPARATING A POLYMER THUS PRODUCT.
Claim 2
Dependent Claim
112 words
A PROCESS FOR POLYMERIZING AN ALIPHATIC CONJUGATED DIOLEFIN, WHICH PROCESS COMPRISES CONTACTING SAID ALIPHATIC CONJUGATED DIOLEFIN IN THE PRESENCE OF A LIQUID HYDROCARBON REACTION MEDIUM WITH CATALYTICALLY EFFECTIVE AMOUNTS OF THE HYDRIDE OF AN ALKALINE EARTH METAL AND AN OXIDE OF A METAL OF GROUP 6A OF THE MENDELEEF PERIODIC TABLE, THE RATIO OF SAID HYDRIDE TO METAL OXIDE CARALYST BEING BETWEEN ABOUT 0.1 AND ABOUT 5 BY WEIGHT, AT A POLYMERIZATION REACTION TEMPERATURE BETWEEN ABOUT 100* C. AND ABOUT 300* C. UNDER A PRESSURE SUFFICIENT TO MAINTAIN A LIQUID PHASE, FOR A PERIOD OF TIME SUFFICIENT TO EFFECT SUBSTAINIAL POLYMERIZATION OF SAID ALIPHATIC CONJUGATED DIOLEFIN, AND SEPARATING A POLYMER THUS PRODUCT.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-11 | 1960-03-12 | 1960-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-11 | 1964-03-12 | 1964-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-11 | 1968-03-12 | 1968-09-11 | $7700.00 | Window Closed / Lapsed |