US2965630A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethylene polymerization
Assignee: WR Grace and Co
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Filing: 1959-04-23
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Granted: 1960-12-20
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Expires: 1979-04-23
Abstract
No abstract record available.
Inventors
- 👤 Alelio Gaetano F D
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:44
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/906
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
44 words
THE METHOD OF POLYMERIZING ETHYLENE THAT COMPRISES SUBJECTING ETHYLENE UNDER SUPER ATOMOSPHERIC PRESSURE TO THE ACTION OF A CATALYST CONSISTING ESSENTIALLY OF 75.7% TI, 15.2% TICL2, 7.4% TICL3, AND 1.7% TICL4 BY WEIGHT, PREPARED BY GRINDING TI METAL AND TICL4 IN AN INERT ATMOSPHERE.
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) | 1963-12-20 | 1964-06-20 | 1964-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-20 | 1968-06-20 | 1968-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-20 | 1972-06-20 | 1972-12-20 | $7700.00 | Window Closed / Lapsed |