US3558681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the production of methylphenylcyclotri-and tetrasiloxanes
Assignee: ALEXANDRA GRIGORIEVNA KUZNETSO
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Filing: 1968-12-18
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Granted: 1971-01-26
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Expires: 1988-12-18
Abstract
Abstract A METHOD OF PRODUCING METHYLPHENYLCYCLOTRI-AND TETRASILOXANES CHARACTERIZED IN THAT METHYLPHENYLDICHLOROSILANE OR METHYLPHENYLDIALKOXYSILANE IS SUBJECTED TO HYDROLYTIC CONDENSATION FOLLOWED BY THERMAL DEGRADATION OF THE FORMED METHYLPHENYLSILOXANE OLIGOMERS IN THE PRESENCE OF LITHIUM HYDROXIDE OF LITHIUM SILANOLATE.
Inventors
- 👤 Alexandra Grigoriev Kuznetsova
- 👤 Sergei Alexandrovich Golubtsov
- 👤 Vladimir Ivanovich Ivanov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:53
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/21
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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |