US2795574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Olefin polymerization with group v metal oxide and alkali metal
Assignee: Standard Oil Co
•
Filing: 1954-02-01
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Granted: 1957-06-11
•
Expires: 1974-02-01
Abstract
No abstract record available.
Inventors
- 👤 Feller Morris
- 👤 Field Edmund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:39
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
IN A PROCESS FOR THE PRODUCTION OF A NORMALLY SOLID POLYMER, THE STEPS OF CONTACTING ETHYLENE WITH AN ALKALI METAL AND A CATALYST COMPRISING ESSENTIALLY AN OXIDE OF A METAL OF SUBGROUP 5 OF THE PERIODIC TABLE AT A POLYMERIZATION REACTION TEMPERATURE BETWEEN ABOUT 75* C. AND ABOUT 325* C., AND SEPARATING A NORMALLY SOLID POLYMER THUS PRODUCED.
Claim 2
Dependent Claim
58 words
IN A PROCESS FOR THE PRODUCTION OF A NORMALLY SOLID POLYMER, THE STEPS OF CONTACTING ETHYLENE WITH AN ALKALI METAL AND A CATALYST COMPRISING ESSENTIALLY AN OXIDE OF A METAL OF SUBGROUP 5 OF THE PERIODIC TABLE AT A POLYMERIZATION REACTION TEMPERATURE BETWEEN ABOUT 75* C. AND ABOUT 325* C., AND SEPARATING A NORMALLY SOLID POLYMER THUS PRODUCED.
References Cited (Backward Citations)
US2487564A
Cited
US2634260A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-10 | 1960-12-10 | 1961-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-10 | 1964-12-10 | 1965-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-10 | 1968-12-10 | 1969-06-11 | $7700.00 | Window Closed / Lapsed |