US3691091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Defoaming emulsion
Assignee: Evonik Operations GmbH
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Filing: 1970-02-10
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Granted: 1972-09-12
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Expires: 1990-02-10
Abstract
Abstract The defoaming activity of an aqueous defoaming emulsion containing an emulsifier, silica in fine particle form and methylpolysiloxanes is increased by incorporating into the emulsion 10 to 60 percent by weight, calculated on the total amount of siloxane in the emulsion, of organosilicon compounds of the general formula: WHEREIN X stands for -OR, R being hydrogen or alkyl of one to four carbon atoms, n has a value of 1.8 to 2.0 and m has a value from 0.02 to 0.33.
Inventors
- 👤 Gotz Koerner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:03
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/02; B01D19/04; B01D19/0404; B01D19/0409; C; C08; C08L; C08L83/00; C08L83/04; C08G; C08G77/00; C08G77/04; C08G77/14; C08G77/16; C08G77/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE1067003B
Cited
US3455839A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |