US2829136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic process
Assignee: Standard Oil Co
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Filing: 1954-09-30
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Granted: 1958-04-01
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Expires: 1974-09-30
Abstract
No abstract record available.
Inventors
- 👤 Jr Peter Fotis
- 👤 Donald L Esmay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:31
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
80 words
A PROCESS FOR PRODUCING A SOLID POLYMER, WHICH PROCESS COMPRISES INTRODUCING A CHARGING STOCK CONSISTING ESSENTIALLY OF ETHYLENE AND AN ADDED CATALYST CONSISTING ESSENTIALLY OF LITHIUM HYDRIDE SUPPORTED UPON AN INERT, GRANULAR SOLID SUPPORTING MATERIAL INTO A POLYMERIZATION ZONE, EFFECTING CONTACTING OFETHYLENE AND SAID CATALYST IN SAID ZONE AT A SUITABLE POLYMERIZATION TEMPERATURE BETWEEN ABOUT 100* C. AND ABOUT 350* C. AT AN ETHYLENE PARTIAL PRESSURE OF AT LEAST ABOUT 500 P. S. I., AND RECOVERING A SOLID THUS PRODUCED.
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) | 1961-03-31 | 1961-09-30 | 1962-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-31 | 1965-09-30 | 1966-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-31 | 1969-09-30 | 1970-04-01 | $7700.00 | Window Closed / Lapsed |