Patent US3830780A successfully refreshed from Google Patents.
US3830780A
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US
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Process for the condensation of organosilicon compounds with si-bonded hydroxyl groups
Assignee: Wacker Chemie AG
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Filing: 1973-01-08
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Granted: 1974-08-20
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Expires: 1993-01-08
Abstract
Abstract A PROCESS FOR CONDENSING ESSENTIALLY LINEAR ORGANOSILICON COMPOUNDS WITH SI-BONDED HYDROXYL GROUPS WHICH COMPRISES HEATING THE ORGANOSILICON COMPOUNDS AT A TEMPERATURE OF FROM ABOUT 100*C. UP TO ABOUT 300*C. IN THE PRESENCE OF AN ALUMINUM CATALYST, AND IF DESIRED, AFTER REMOVING THE ALUMINUM CATALYST HEATING THE THUS TREATED PRODUCT TO A TEMPERATURE OF FROM 100*C. TO 300*C. IN THE PRESENCE OF UNTREATED ESSENTIALLY LINEAR ORGANOSILICON COMPOUNDS HAVING SI-BONDED HYDROXYL GROUPS.
Inventors
- 👤 S Nitzsche
- 👤 H Spork
- 👤 R Strasser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:23
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/06; C08G77/08; C08K; C08K3/00; C08K3/02; C08K3/08
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) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |