US2861983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic process for the production of solid polymers of ethylene by the use of lithium
Assignee: Standard Oil Co
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Filing: 1954-09-30
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Granted: 1958-11-25
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Expires: 1974-09-30
Abstract
No abstract record available.
Inventors
- 👤 Jr Peter Fotis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:11
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A PROCESS FOR PRODUCING A SOLID POLYMER, WHICH PROCESS COMPRISES INTRODUCING A CHARGING STOCK CONSISTING ESSENTIALLY OF ETHYLENE AND A CATALYST CONSISTING ESSENTIALLY OF LITHIUM INTO A POLYMERIZATION ZONE, EFFECTING CONTACTING OF ETHYLENE AND LITHIUM IN SAID ZONE AT A TEMPERATURE BETWEEN ABOUT 100*C. AND ABOUT 350*C. AT AN ETHYLENE PARTIAL PRESSURE OF AT LEAST 500 P.S.I., AND RECOVERING A SOLID POLYMER THUS PRODUCED.
Claim 2
Dependent Claim
64 words
A PROCESS FOR PRODUCING A SOLID POLYMER, WHICH PROCESS COMPRISES INTRODUCING A CHARGING STOCK CONSISTING ESSENTIALLY OF ETHYLENE AND A CATALYST CONSISTING ESSENTIALLY OF LITHIUM INTO A POLYMERIZATION ZONE, EFFECTING CONTACTING OF ETHYLENE AND LITHIUM IN SAID ZONE AT A TEMPERATURE BETWEEN ABOUT 100*C. AND ABOUT 350*C. AT AN ETHYLENE PARTIAL PRESSURE OF AT LEAST 500 P.S.I., AND RECOVERING A SOLID POLYMER THUS PRODUCED.
References Cited (Backward Citations)
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Cited
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US2467245A
Cited
US2699457A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-24 | 1962-05-26 | 1962-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-24 | 1966-05-26 | 1966-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-24 | 1970-05-26 | 1970-11-25 | $7700.00 | Window Closed / Lapsed |