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US2816490A
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Apparatus for treating liquid mixtures for separation of solid particles and gases
Assignee: Nichols Engineering and Research Corp
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Filing: 1952-12-06
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Granted: 1957-12-17
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Expires: 1972-12-06
Abstract
No abstract record available.
Inventors
- 👤 John D Boadway
- 👤 Freeman Horace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:28
CPC Classifications
D; D21; D21D; D21D5/00; D21D5/26; B; B01; B01D; B01D19/00; B01D19/0042; B01D19/0052; B01D19/0057; B01D21/00; B01D21/24; B01D21/2405; B01D21/2411; B01D21/2427; B01D21/26; B01D21/267; B01D21/30; B01D21/34; B04; B04C; B04C3/00; B04C3/06; B04C5/00; B04C5/08; B04C5/081; B04C5/107; B04C5/12; B04C5/14; B04C5/15; B04C5/18; B04C5/185; D21D5/18; D21D5/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-16 | 1961-06-17 | 1961-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-16 | 1965-06-17 | 1965-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-16 | 1969-06-17 | 1969-12-17 | $7700.00 | Window Closed / Lapsed |