US3129212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of ethylene in the presence of a free radical initiator, a chemical modifier, and methane as a physical modifier
Assignee: Monsanto Chemicals Ltd
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Filing: 1960-12-30
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Granted: 1964-04-14
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Expires: 1980-12-30
Abstract
No abstract record available.
Inventors
- 👤 George A Mortimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:01
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A PROCESS FOR THE POLYMERIZATION OF ETHYLENE AT A TEMPERATURE IN THE RANGE FROM ABOUT 100*C. TO ABOUT 400*C. AND THE PRESSURE IN THE RANGE FROM ABOUT 15,000 P.S.I. TO ABOUT 40,000 P.S.I. IN THE PRESENCE OF A FREE RADICAL INITIATOR, A CHEMICAL MODIFIER CHOSEN FROM THE GROUP CONSISTING OF ALIPHATIC HYDROCARBONS, ALKYL AROMATIC HYDROCARBONS, CYCLIC HYDROCARBONS, HALOGEN-SUBSTITUTED HYDROCARBONS, ALCOHOLS, KETONES, ETHERS, ESTERS AND HYDROGEN, AND METHANE AS A PHYSICAL MODIFIER.
Claim 2
Dependent Claim
71 words
A PROCESS FOR THE POLYMERIZATION OF ETHYLENE AT A TEMPERATURE IN THE RANGE FROM ABOUT 100*C. TO ABOUT 400*C. AND THE PRESSURE IN THE RANGE FROM ABOUT 15,000 P.S.I. TO ABOUT 40,000 P.S.I. IN THE PRESENCE OF A FREE RADICAL INITIATOR, A CHEMICAL MODIFIER CHOSEN FROM THE GROUP CONSISTING OF ALIPHATIC HYDROCARBONS, ALKYL AROMATIC HYDROCARBONS, CYCLIC HYDROCARBONS, HALOGEN-SUBSTITUTED HYDROCARBONS, ALCOHOLS, KETONES, ETHERS, ESTERS AND HYDROGEN, AND METHANE AS A PHYSICAL MODIFIER.
References Cited (Backward Citations)
US2482877A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-14 | 1967-10-14 | 1968-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-14 | 1971-10-14 | 1972-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-14 | 1975-10-14 | 1976-04-14 | $7700.00 | Window Closed / Lapsed |