Patent US2999088A successfully refreshed from Google Patents.
US2999088A
Expired / Lapsed
US
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Polymerisation process
Assignee: Distillers Co Yeast Ltd
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Filing: 1957-08-26
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Granted: 1961-09-05
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Expires: 1977-08-26
Abstract
No abstract record available.
Inventors
- 👤 Fraser Donald Alexander
- 👤 Raum Alaric Louis Jeffrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:06
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A PROCESS FOR THE POLYMERISATION OF A CONJUGATED ALKENE WHICH COMPRISES CONTACTING THE ALKENE IN A LIQUID REACTION MEDIUM WITH A POLYMERISATION INITIATOR SYSTEM FORMED BY MIXING 1 MOLECULAR EQUIVALENT OF LITHIUM BOROHYDRIDE WITH FROM 0.3 TO 3 MOLECULAR EQUIVALENT OF A HALIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF TITANIUM, ZIRCONIUM AND VANADIUM.
Claim 2
Dependent Claim
56 words
A PROCESS FOR THE POLYMERISATION OF A CONJUGATED ALKENE WHICH COMPRISES CONTACTING THE ALKENE IN A LIQUID REACTION MEDIUM WITH A POLYMERISATION INITIATOR SYSTEM FORMED BY MIXING 1 MOLECULAR EQUIVALENT OF LITHIUM BOROHYDRIDE WITH FROM 0.3 TO 3 MOLECULAR EQUIVALENT OF A HALIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF TITANIUM, ZIRCONIUM AND VANADIUM.
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) | 1964-09-04 | 1965-03-06 | 1965-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-04 | 1969-03-06 | 1969-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-04 | 1973-03-06 | 1973-09-05 | $7700.00 | Window Closed / Lapsed |