US3573222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Defoaming composition,its use and process for its preparation
Assignee: Pennwalt Corp
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Filing: 1969-07-02
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Granted: 1971-03-30
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Expires: 1989-07-02
Abstract
Abstract COMPOSITION USEFUL FOR DEFOAMING CONSISTING ESSENTIALLY OF FROM ABOUT 70 TO ABOUT 95 PARTS BY WEIGHT OF A HYDROCARBON FLUID AND FROM ABOUT 5 TO ABOUT 30 PARTS BY WEIGHT OF A SYNTHETIC ALKALI METAL OR ALKALINE EARTH METAL SILICO ALUMINATE HAVING AN AVERAGE PARTICLE SIZE NO GREATER THAN ABOUT 200 MILLIMICRONS, SAID SILICO ALUMINATE HAVING BEEN MADE HYDROPHOBIC WHILE IN SAID HYDROCARBON OR HALOCARBON FLUID BY REACTION AT A TEMPERATURE NOT EXCEEDING ABOUT 75*C. WITH ABOUT 7% TO ABOUT 30% BY WEIGHT OF SAID SILICO ALUMINATE OF A HALOSILANE.
Inventors
- 👤 George Conrad Harrison Jr
- 👤 Anthony Joseph Stumpo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:14
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/02; B01D19/04; B01D19/0404; B01D19/0409
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) | 1974-03-29 | 1974-09-28 | 1975-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-29 | 1978-09-28 | 1979-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-29 | 1982-09-28 | 1983-03-30 | $7700.00 | Window Closed / Lapsed |