US3207698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition and method for defoaming aqueous systems
Assignee: Nopco Chemical Co
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Filing: 1963-02-13
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Granted: 1965-09-21
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Expires: 1983-02-13
Abstract
No abstract record available.
Inventors
- 👤 Liebling Raymond
- 👤 Nicholas M Canaris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:04
CPC Classifications
D; D21; D21C; D21C3/00; D21C3/22; D21C3/28; B; B01; B01D; B01D19/00; B01D19/02; B01D19/04; B01D19/0404; B01D19/0409
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
110 words
A METHOD OF DEFOAMING AQUEOUS SYSTEMS CONTAINING FOAM PRODUCING SOLIDS COMPRISING ADDING TO THE SYSTEM, FROM ABOUT 0.01% TO 0.5% BY WEIGHT OF SAID FOAM PRODUCING SOLIDS, A DEFOAMING COMPOSITION CONSISTING ESSENTIALLY OF FROM ABOUT 3% TO 30% BY WEIGHT OF A HYDROPHOBIC PRECIPITATED SILICA DISPERSED IN FROM ABOUT 70% TO 97% BY WEIGHT OF A HYDROPHOBIC NON-POLAR ORGANIC LIQUID HAVING A BOILING POINT OF AT LEAST 150*F., AND HYDROPHOBIC SILICA CONTAINING SOLID SILICA PARTICLES HAVING A PH OF FROM ABOUT 8 TO 10, AN AVERAGE PARTICLE DIAMETER OF FROM ABOUT 0.005 TO 0.05 MICRON AND AN AVERAGE SURFACE AREA OF FROM ABOUT 200 TO 400 SQUARE METERS PER GRAM.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |