US2658059A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethylene polymerization in the vapor phase
Assignee: Standard Oil Co
•
Filing: 1950-04-27
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Granted: 1953-11-03
•
Expires: 1970-04-27
Abstract
No abstract record available.
Inventors
- 👤 Edwin F Peters
- 👤 Bernard L Evering
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:27
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/90; B01J23/94; C; C08; C08F; C08F10/00; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584; Y10; Y10S; Y10S526/00; Y10S526/901; Y10S585/00; Y10S585/929; Y10S585/946
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
78 words
IN A PROCESS FOR THE POLYMERIZATION OF ETH YLENE BY CONTACT IN THE GASEOUS STATE WITH A CATALYST COMPRISING ESSENTIALLY AN ACTIVATED CARBON-SUPPORTED METAL SELECTED FROM THE GROUP CONSISTING OF NICKEL, COBALT AND NICKEL-COBALT MIXTURES AT A TEMPERATURE BETWEEN ABOUT 0* C. AND ABOUT 250* C. AND A PRESSURE OF AT LEAST ABOUT 500 P.S.I.G., THE STEPS OF CONTINUING SAID PROCESS UNTIL SAID CATALYST CONTAINS A SUBSTANTIAL AMOUNT EQUAL TO AT LEAST ABOUT 1.7 PERCENT BY WEIGHT OF
References Cited (Backward Citations)
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US2457556A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-02 | 1957-05-04 | 1957-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-02 | 1961-05-04 | 1961-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-02 | 1965-05-04 | 1965-11-03 | $7700.00 | Window Closed / Lapsed |