Patent US4487989A successfully refreshed from Google Patents.
Patent US3450686A successfully refreshed from Google Patents.
US3450686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of ethylene utilizing an organoperoxysilane as the catalyst
Assignee: Monsanto Co
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Filing: 1964-12-31
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Granted: 1969-06-17
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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
2026-10-31 22:53
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A PROCESS FOR PRODUCING NORMALLY SOLID ETHYLENE POLYMERS WHICH COMPRISES POLYMERIZING ETHYLENE AT TEMPERATURES FROM ABOUT 140* TO ABOUT 350*C. AND PRESSURES FROM ABOUT 5,000 TO ABOUT 50,000 P.S.I. IN THE PRESENCE OF AN AMOUNT SUFFICIENT TO INITIATE SAID POLYMERIZATION OF AN ORGANOPEROXYSILANE OF THE FORMULA
Claim 2
Dependent Claim
46 words
A PROCESS FOR PRODUCING NORMALLY SOLID ETHYLENE POLYMERS WHICH COMPRISES POLYMERIZING ETHYLENE AT TEMPERATURES FROM ABOUT 140* TO ABOUT 350*C. AND PRESSURES FROM ABOUT 5,000 TO ABOUT 50,000 P.S.I. IN THE PRESENCE OF AN AMOUNT SUFFICIENT TO INITIATE SAID POLYMERIZATION OF AN ORGANOPEROXYSILANE OF THE FORMULA
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) | 1972-06-16 | 1972-12-16 | 1973-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-16 | 1976-12-16 | 1977-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-16 | 1980-12-16 | 1981-06-17 | $7700.00 | Window Closed / Lapsed |