US3697442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compositions for controlling foam in aqueous systems and its method of use
Assignee: Veolia WTS USA Inc
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Filing: 1970-08-13
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Granted: 1972-10-10
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Expires: 1990-08-13
Abstract
Abstract THIS DISCLOSURE RELATES TO DEFOAMING COMPOSITION AND THEIR USE IN CONTROLLING FOAM IN AQUEOUS SYSTEMS. THE COMPOSITIONS WHICH CAN BE EMULSIVE IN CHARACTER CONTAIN IN COMBINATION OF A MIXTURE OF ALUMINUM OXIDE PARTICLES AND HYDROPHOBIC SILICA PARTICLES, AT LEAST ONE ALKALINE EARTH METAL HYDROXIDE, AT LEAST ONE FATTY ACID CONTAINING 6 TO 24 AND PREFERABLY 16 TO 22 CARBON ATOMS, AND A WATER-INSOLUBLE LIQUID ORGANIC CARRIER. THE COMPOSITION MAY CONTAIN WATER, AND WHERE THE LIQUID CARRIER IS HYDROPHOBIC IN CHARACTER, THE COMPOSITION WILL BE AN EMULSION. IN CERTAIN INSTANCE IT IS DESIRABLE TO INCORPORATE SURFACEACTIVE AGENTS (SURFACTANTS) OR SPREADING AGENTS IN THE COMPOSITION.
Inventors
- 👤 Hillel Lieberman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:47
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/02; B01D19/04; B01D19/0404
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) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |