US2849930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for treating pulp suspensions and other fluids for removal of undesired particles and gases
Assignee: Nichols Engineering and Research Corp
•
Filing: 1952-12-06
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Granted: 1958-09-02
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Expires: 1972-12-06
Abstract
No abstract record available.
Inventors
- 👤 Freeman Horace
- 👤 John D Boadway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:34
CPC Classifications
D; D21; D21D; D21D5/00; D21D5/18; B; B01; B01D; B01D19/00; B01D19/0042; B01D19/0052; B01D19/0057; B01D21/00; B01D21/0003; B01D21/0087; 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; D21D5/24; D21D5/26; Y; Y10; Y10S; Y10S261/00; Y10S261/54
Claims Analysis
Total Claims: 0
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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) | 1961-09-01 | 1962-03-03 | 1962-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-01 | 1966-03-03 | 1966-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-01 | 1970-03-03 | 1970-09-02 | $7700.00 | Window Closed / Lapsed |