US3061603A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of ethylene in the presence of a hydride of boron and oxygen containing catalyst
Assignee: Monsanto Chemicals Ltd
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Filing: 1959-06-10
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Granted: 1962-10-30
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Expires: 1979-06-10
Abstract
No abstract record available.
Inventors
- 👤 John D Calfee
- 👤 Jr William R Richard
- 👤 Lowell E Erbaugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:48
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
THE METHOD OF PREPARING HIGH MOLECULAR WEIGHT POLYMERS OF ETHYLENE HAVING WEIGHT AVERAGE MOLECULAR WEIGHT GREATER THAN ABOUT 100,000 AND DENSISTY GREATER THAN ABOUT 0.925 WHICH COMPRISES POLYMERIZING ETHYLENE IN THE PRESENCE OF A HYDRIDE OF BORON AT PRESSURES OF GREATER THAN 10,000 P.S.I. BY THE CONTROLLED ADDITION OF OXYGEN CATALYST, THE HYDRIDE OF BORON BEING IN AMOUNT NO GREATER THAN 0.01% BY WEIGHT OF THE ETHYLENE AND THE OXYGEN CATALYST IN AMOUNT EQUIMOLAR TO ABOUT 0.0001 TO ABOUT 0.01% OXYGEN BY WEIGHT OF THE ETHYLENE
Claim 2
Independent Claim
86 words
THE METHOD OF PREPARING HIGH MOLECULAR WEIGHT POLYMERS OF ETHYLENE HAVING WEIGHT AVERAGE MOLECULAR WEIGHT GREATER THAN ABOUT 100,000 AND DENSISTY GREATER THAN ABOUT 0.925 WHICH COMPRISES POLYMERIZING ETHYLENE IN THE PRESENCE OF A HYDRIDE OF BORON AT PRESSURES OF GREATER THAN 10,000 P.S.I. BY THE CONTROLLED ADDITION OF OXYGEN CATALYST, THE HYDRIDE OF BORON BEING IN AMOUNT NO GREATER THAN 0.01% BY WEIGHT OF THE ETHYLENE AND THE OXYGEN CATALYST IN AMOUNT EQUIMOLAR TO ABOUT 0.0001 TO ABOUT 0.01% OXYGEN BY WEIGHT OF THE ETHYLENE
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) | 1965-10-29 | 1966-04-30 | 1966-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-29 | 1970-04-30 | 1970-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-29 | 1974-04-30 | 1974-10-30 | $7700.00 | Window Closed / Lapsed |