US2856391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of 2-substituted butadiene-1,3 hydrocarbons with a catalyst comprising a lithium alkoxide and an alkenyl lithium compound
Assignee: Goodrich Corp
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Filing: 1956-01-09
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Granted: 1958-10-14
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Expires: 1976-01-09
Abstract
No abstract record available.
Inventors
- 👤 Hugh E Diem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:15
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A METHOD OF POLYMERIZING A BUTADIENE-1,3 HYDROCARBON HAVING A HYDROCARBON SUBSTITUENT AND THAT ONLY ON THE 2-CARBON ATOM TO PRODUCE A POLYMER IN WHICH AT LEAST 90 PERCENT OF THE SUBSTITUED BUTADIENE UNITS ARE UNITED IN THE CIS-1,4 CONFIGURATION, WHICH METHOD COMPRISES POLYMERIZING SAID 2-SUBSTITUTED BUTADIENE-1,3 HYDROCARBON IN THE PRESENCE OF A CATALYST COMPRISING A MIXTURE OF (1) A LITHIUM ALKOXIDE AND (2) AN ALKENYL LITHIUM COMPOUND.
Claim 2
Independent Claim
67 words
A METHOD OF POLYMERIZING A BUTADIENE-1,3 HYDROCARBON HAVING A HYDROCARBON SUBSTITUENT AND THAT ONLY ON THE 2-CARBON ATOM TO PRODUCE A POLYMER IN WHICH AT LEAST 90 PERCENT OF THE SUBSTITUED BUTADIENE UNITS ARE UNITED IN THE CIS-1,4 CONFIGURATION, WHICH METHOD COMPRISES POLYMERIZING SAID 2-SUBSTITUTED BUTADIENE-1,3 HYDROCARBON IN THE PRESENCE OF A CATALYST COMPRISING A MIXTURE OF (1) A LITHIUM ALKOXIDE AND (2) AN ALKENYL LITHIUM COMPOUND.
References Cited (Backward Citations)
US1058056A
Cited
US2506857A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-13 | 1962-04-14 | 1962-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-13 | 1966-04-14 | 1966-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-13 | 1970-04-14 | 1970-10-14 | $7700.00 | Window Closed / Lapsed |