US3377330A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethylene polymerization in the presence of a free-radical catalyst and as a chain-transfer agent a minor amount of phosphine
Assignee: Monsanto Co
•
Filing: 1964-12-31
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Granted: 1968-04-09
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Expires: 1984-12-31
Abstract
No abstract record available.
Inventors
- 👤 George A Mortimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:16
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
THE PROCESS FOR PRODUCING ETHYLENE POLYMERS WHICH COMPRISES POLYMERIZING ETHYLENE AT ELEVATED TEMPERATURES AND PRESSURES IN THE PRESENCE OF AN AMOUNT SUFFICIENT TO INITIATE SAID POLYMERIZATION OF A FREE-RADICAL-GENERATING COMPOUND AND AS A CHAIN-TRANSFER AGENT A MINOR AMOUNT OF PHOSPHINE.
Claim 2
Dependent Claim
40 words
THE PROCESS FOR PRODUCING ETHYLENE POLYMERS WHICH COMPRISES POLYMERIZING ETHYLENE AT ELEVATED TEMPERATURES AND PRESSURES IN THE PRESENCE OF AN AMOUNT SUFFICIENT TO INITIATE SAID POLYMERIZATION OF A FREE-RADICAL-GENERATING COMPOUND AND AS A CHAIN-TRANSFER AGENT A MINOR AMOUNT OF PHOSPHINE.
References Cited (Backward Citations)
US3129212A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-09 | 1971-10-09 | 1972-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-09 | 1975-10-09 | 1976-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-09 | 1979-10-09 | 1980-04-09 | $7700.00 | Window Closed / Lapsed |