US3663634A
Expired / Lapsed
US
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Preparation of organodilithium initiator and polymerizations utilizing same
Assignee: Goodyear Tire and Rubber Co
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Filing: 1969-09-19
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Granted: 1972-05-16
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Expires: 1989-09-19
Abstract
Abstract A METHOD OF PREPARING HYDROCARBON SOLUBLE ORGANODILITHIUM POLYMERIZATION INITIATORS IN A ONE-STEP PROCESS BY FORMING THE ORGANODILITHIUM INITIATORS IN A SOLVENT SYSTEM COMPRISING (A) A COMPOUND SELECTED FROM A GROUP CONSISTING OF ALIPHATIC, CYCLOALIPHATIC AND AROMATIC HYDROCARBONS AND (B) AT LEAST ONE COMPOUND SELECTED FROM A GROUP CONSISTING OF AROMATIC ETHERS, AROMATIC THIOETHERS AND TERTIARY AMINES RESPONDING TO THE FORMULA R''R"R''"N WHERE N IS NITROGEN AND R'', R" AND R''" ARE ALKYL, CYCLOALKYL AND ALKARYL RADICALS AND WHERE R'', R" AND R''" MAY OR MAY NOT BE THE SAME AND WHERE THE (B) SOLVENT COMPONENT CAN RANGE FROM AT LEAST 10 PERCENT BY VOLUME.
Inventors
- 👤 Maurice Morton
- 👤 Lewis J Fetters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:34
CPC Classifications
C; C08; C08F; C08F297/00; C08F297/02; C08F297/04; C08F297/046; C07; C07F; C07F1/00; C07F1/02; C08F36/00; C08F36/02; C08F36/04
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) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |