Patent US260993A successfully refreshed from Google Patents.
Patent US3661793A successfully refreshed from Google Patents.
US3661793A
Expired / Lapsed
US
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Defoaming composition and a method for its use
Assignee: Pioneer Chemical Works Inc
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Filing: 1969-08-22
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Granted: 1972-05-09
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Expires: 1989-08-22
Abstract
Abstract A COMPOSITION IS SET FORTH COMPRISING, BY WEIGHT BASED ON THE COMPOSITION, ABOUT 75% ABOUT 97% OF A WATER INSOLUBLE HYDROPHOBIC ORGANIC LIQUID, ABOUT 3% TO ABOUT 20% OF NORMALLY HYDRPHILIC PERLITE HAVE A HYDRPHOBIC SURFACE, 0% TO ABOUT 5% OF A SURFACTANT, 0% TO ABOUT 5% OF HYDROPHOBIC SILICA AND 0% TO ABOUT 5% OF A SUSPENSION AID. THIS COMPOSITION IS VALUABLE IN CONTROLLING FOAMING IN AN AQUEOUS SYSTEM.
Inventors
- 👤 Gerald B Curtis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:17
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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |