US3769345A
Expired / Lapsed
US
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Method of preparing organolithium amine complexes
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1967-12-13
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Granted: 1973-10-30
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Expires: 1987-12-13
Abstract
Abstract ORGANOLITHIUM AMINE COMPLEXES ARE PREPARED BY ADMIXING AN ORGANOLITHIUM, A TERTIARY CHELATING POLYAMINE AND A HYDROCARBON GROUP-CONTAINING COMPOUND HAVING A PKA OF ABOUT 40 OR LESS. THE COMPLEXES MAY BE RECOVERED OR THE REACTION MIXTURE USED AS IS FOR POLYMERIZATION, TELOMERIZATION AND GRIGNARD-TYPE REACTIONS.
Inventors
- 👤 A Langer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:12
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/2642; C08G65/269; C07; C07F; C07F1/00; C07F1/02; C07F7/00; C07F7/02; C07F7/08; C07F7/0803; C07F7/0805; C07F7/081; C07F7/0825; C07F7/0827; C08C; C08C19/00; C08C19/26; C08F; C08F36/00; C08F36/02; C08F36/04; C08F4/00; C08F4/06; C08F4/12; C08G65/04; C08G65/06; C08G65/08; C08G65/10; C08G65/12
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |