US2920761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for separating and deaerating pulp suspension
Assignee: Nichols Engineering and Research Corp
•
Filing: 1953-01-13
•
Granted: 1960-01-12
•
Expires: 1973-01-13
Abstract
No abstract record available.
Inventors
- 👤 Freeman Horace
- 👤 John D Boadway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:28
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; B01D21/26; B01D21/267; B04; B04C; B04C3/00; 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)
US2102525A
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US2377524A
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US2614656A
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US2685937A
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US2571219A
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US2642950A
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US2878934A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |