US3697440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Defoamer compositions containing organic particles
Assignee: Diamond Shamrock Corp
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Filing: 1969-06-27
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Granted: 1972-10-10
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Expires: 1989-06-27
Abstract
Abstract DEFOAMER COMPOSITIONS ARE PREPARED BY USING PARTICULAR OIL INSOLUBLE NORMALLY SOLID ORGANIC POLYMER PARTICLES, SECONDARY ORGANIC POLYMERS WHICH MAY BE OIL SOLUBLE OR OIL INSOLUBLE AND LIQUID HYDROCARBONS. OPTIONALLY, AMIDS AND SILICONE OILS ARE PRESENTS.
Inventors
- 👤 Irwin A Lichtman
- 👤 Fred E Woodward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:56
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 |