US2920067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of ethylene
Assignee: Monsanto Chemicals Ltd
•
Filing: 1958-08-11
•
Granted: 1960-01-05
•
Expires: 1978-08-11
Abstract
No abstract record available.
Inventors
- 👤 George A Mortimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:34
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
THE PROCESS OF POLYMERIZING ETHYLENE WHICH COMPRISES HEATING ETHYLENE TO A TEMPERATURE OF AT LEAST 150* C. AT A PRESSURE IN EXCESS OF 2500 P.S.I.G. IN THE PRESENCE OF AN ALKYL NITRATE CONTAINING FROM 1 TO 8 CARBON ATOMS IN AN AMOUNT SUFFICIENT TO INITIATE THE POLYMERIZATION.
Claim 2
Dependent Claim
47 words
THE PROCESS OF POLYMERIZING ETHYLENE WHICH COMPRISES HEATING ETHYLENE TO A TEMPERATURE OF AT LEAST 150* C. AT A PRESSURE IN EXCESS OF 2500 P.S.I.G. IN THE PRESENCE OF AN ALKYL NITRATE CONTAINING FROM 1 TO 8 CARBON ATOMS IN AN AMOUNT SUFFICIENT TO INITIATE THE POLYMERIZATION.
References Cited (Backward Citations)
US2478066A
Cited
US2462678A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |