Patent US3006909A successfully refreshed from Google Patents.
US3006909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of solid polyethylene with zirconium oxide, silica-alumina catalysts
Assignee: Phillips Petroleum Co
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Filing: 1957-09-13
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Granted: 1961-10-31
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Expires: 1977-09-13
Abstract
No abstract record available.
Inventors
- 👤 Donald R Witt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:44
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
A PROCESS WHICH COMPRISES CONTACTING ETHYLENE AT A TEMPERATURE IN THE RANGE 100 TO 550*F. WITH A CATALYST ACTIVE FOR ETHYLENE POLYMERIZATION AND CONSISTING ESSENTIALLY OF ZIRCONIUM OXIDE ASSOCIATED WITH A SILICA AND ALUMINA COMPOSITE TO FORM A NORMALLY SOLID POLYMER OF ETHYLENE.
Claim 2
Dependent Claim
43 words
A PROCESS WHICH COMPRISES CONTACTING ETHYLENE AT A TEMPERATURE IN THE RANGE 100 TO 550*F. WITH A CATALYST ACTIVE FOR ETHYLENE POLYMERIZATION AND CONSISTING ESSENTIALLY OF ZIRCONIUM OXIDE ASSOCIATED WITH A SILICA AND ALUMINA COMPOSITE TO FORM A NORMALLY SOLID POLYMER OF ETHYLENE.
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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) | 1964-10-30 | 1965-05-01 | 1965-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-30 | 1969-05-01 | 1969-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-30 | 1973-05-01 | 1973-10-31 | $7700.00 | Window Closed / Lapsed |