US2945019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethylene polymerization
Assignee: WR Grace and Co
•
Filing: 1959-06-09
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Granted: 1960-07-12
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Expires: 1979-06-09
Abstract
No abstract record available.
Inventors
- 👤 Walter R Wszolek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:28
CPC Classifications
C; C08; C08F; C08F110/00; C08F110/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
THE PROCESS OF FORMING NORMALLY SOLID POLYMERS OF ETHYLENE WHICH COMPRISES SUBJECTING ETHYLENE IN AN INERT LIQUID HYDROCARBON SOLVENT AT A PRESSURE IN THE RANGE 100-1000 P.S.I. AND A TEMPERATURE IN THE RANGE 50-300* C. TO ACTION OF A CATALYST CONSISTING ESSENTIALLY OF TITANIUM CARBIDE.
Claim 2
Dependent Claim
45 words
THE PROCESS OF FORMING NORMALLY SOLID POLYMERS OF ETHYLENE WHICH COMPRISES SUBJECTING ETHYLENE IN AN INERT LIQUID HYDROCARBON SOLVENT AT A PRESSURE IN THE RANGE 100-1000 P.S.I. AND A TEMPERATURE IN THE RANGE 50-300* C. TO ACTION OF A CATALYST CONSISTING ESSENTIALLY OF TITANIUM CARBIDE.
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) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |