Patent US2234491A successfully refreshed from Google Patents.
Patent US3388073A successfully refreshed from Google Patents.
US3388073A
Expired / Lapsed
US
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Process of defoaming and inhibiting foam formation in aqueous systems
Assignee: ChampionX LLC
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Filing: 1963-12-16
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Granted: 1968-06-11
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Expires: 1983-12-16
Abstract
No abstract record available.
Inventors
- 👤 Domba Elemer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:53
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/02; B01D19/04; B01D19/0404; B01D19/0495
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA544234A
Cited
US2786042A
Cited
US2802850A
Cited
US2938009A
Cited
US3076768A
Cited
US2993809A
Cited
US3207698A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-11 | 1971-12-11 | 1972-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-11 | 1975-12-11 | 1976-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-11 | 1979-12-11 | 1980-06-11 | $7700.00 | Window Closed / Lapsed |