US3304266A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foam control agents
Assignee: Dow Silicones Corp
•
Filing: 1963-05-06
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Granted: 1967-02-14
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Expires: 1983-05-06
Abstract
No abstract record available.
Inventors
- 👤 Robert E Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:50
CPC Classifications
C; C10; C10G; C10G21/00; B; B01; B01D; B01D19/00; B01D19/02; B01D19/04; B01D19/0404; C07; C07C; C07C7/00; C07C7/04; C07C7/05; C07C7/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A FOAM CONTROL AGENT CONSISTING ESSENTIALLY OF A MIXTURE OF 1 TO 10 PERCENT BY WEIGHT OF SILICA HAVING A SURFACE AREA OF AT LEAST 50 SQUARE METERS PER GRAM AND A WATER INSOLUBLE POLYALKYLENE GLYCOL, SAID AGENT HAVING BEEN PREPARED BY HEATING THE MIXTURE AT A TEMPERATURE OF AT LEAST 100*C. WHILE SUBJECTING THE MIXTURE TO A SHEARING ACTION WHEREBY AN IMPROVED FOAM CONTROL AGENT WAS OBTAINED.
Claim 2
Dependent Claim
68 words
A FOAM CONTROL AGENT CONSISTING ESSENTIALLY OF A MIXTURE OF 1 TO 10 PERCENT BY WEIGHT OF SILICA HAVING A SURFACE AREA OF AT LEAST 50 SQUARE METERS PER GRAM AND A WATER INSOLUBLE POLYALKYLENE GLYCOL, SAID AGENT HAVING BEEN PREPARED BY HEATING THE MIXTURE AT A TEMPERATURE OF AT LEAST 100*C. WHILE SUBJECTING THE MIXTURE TO A SHEARING ACTION WHEREBY AN IMPROVED FOAM CONTROL AGENT WAS OBTAINED.
References Cited (Backward Citations)
US2055666A
Cited
US2575298A
Cited
US2575276A
Cited
US3015645A
Cited
US2894913A
Cited
US3004921A
Cited
US3113930A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |