Patent BE546780A successfully refreshed from Google Patents.
Patent US3467581A successfully refreshed from Google Patents.
US3467581A
Expired / Lapsed
US
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Method for improving distillation efficiency of an aqueous mixture by addition of a silicon-containing material
Assignee: ChampionX LLC
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Filing: 1965-12-13
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Granted: 1969-09-16
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Expires: 1985-12-13
Abstract
No abstract record available.
Inventors
- 👤 Walter R Privette
- 👤 Elemer Domba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:08
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2808378A
Cited
US2382044A
Cited
US2467177A
Cited
US2461371A
Cited
US3264365A
Cited
US3180786A
Cited
US3267042A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-15 | 1973-03-17 | 1973-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-15 | 1977-03-17 | 1977-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-15 | 1981-03-17 | 1981-09-16 | $7700.00 | Window Closed / Lapsed |