US3555066A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organo-lithium derivatives of alpha-silylmethyl sulfides
Assignee: Dow Silicones Corp
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Filing: 1968-12-13
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Granted: 1971-01-12
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Expires: 1988-12-13
Abstract
Abstract ORGANOSILYL COMPOUNDS OF THE FORMULA R"-S-C(-LI)(-R'')-SI(-R)3 WHERE R IS HYDROCARBON, H, OR NX2, R'' IS R3SI-OR HYDROCARBON, R" IS ALKYL OR PHENYL AND X IS ALKYL ARE PREPARED BY REACTING R"-S-CH(-R'')-SI(-R)3 WITH ALKYL LITHIUM COMPOUNDS. THELITHIUM COMPOUNDS ARE USEFUL AS POLYMERICATION CATALYSTS FOR STYRENE.
Inventors
- 👤 Gary E Le Grow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:07
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/10; C07F7/0803; C07F7/081; C07F7/0896; C08; C08F; C08F12/00; C08F12/02; C08F12/04; C08F12/06; C08F12/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |