US3655713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silacyclopentane thiols and thiolates
Assignee: Dow Silicones Corp
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Filing: 1970-07-13
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Granted: 1972-04-11
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Expires: 1990-07-13
Abstract
Abstract SILACYCLOPENTANE MERCAPTANS AND THIOLATES OF THE FORMULA 1-(O(2-N-M/2)-XM-RN-),3-(Y-S-),3,4-DI(R''-)SILACYCLOPENTANE IN WHICH Y IS HYDROGEN OR AN ACYL GROUP, N IS 0 OR 1, M IS 0 TO 2, ARE PREPARED BY THE ADDITION OF H2S OR ACYL-SH TO THE CORRESPONDING SILACYCLOPENTENE IN THE PRESENCE OF FREE RADICAL GENERATORS SUCH AS PEROXIDES, AZOBIS-NITRILES OR ULTRAVIOLET LIGHT. SPECIFIC COMPOUNDS WHERE Z IS 3,4-DI(R'')-1,3-SILACYCLOPENTYLENE ARE HSZ(CH3)C1, (CH3COSZ(CH3))2O AND (HSZO)NTHE NOVEL COMPOUNDS ARE USEFUL AS LUBRICANTS, LUBRICANT ADDITIVES, AND CHEMICAL INTERMEDIATES.
Inventors
- 👤 Gary E Le Grow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:35
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C07F7/0838; C07F7/12; C07F7/18; C07F7/1804; C10M2227/00; C10M2227/04; C10M2229/00; C10M2229/04; C10M2229/05; C10M2229/053
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) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |