US2545374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-stage filter in single housing
Assignee: WM W NUGENT AND CO Inc
•
Filing: 1949-08-11
•
Granted: 1951-03-13
•
Expires: 1969-08-11
Abstract
No abstract record available.
Inventors
- 👤 Corliss D Nugent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:35
CPC Classifications
B; B01; B01D; B01D27/00; B01D24/00; B01D24/002; B01D24/02; B01D24/04; B01D24/045; B01D24/047; B01D29/00; B01D29/11; B01D29/13; B01D29/23; B01D29/232; B01D29/237; B01D29/50; B01D29/56; B01D35/00; B01D35/14; B01D35/147; Y; Y10; Y10S; Y10S210/00; Y10S210/13
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US420136A
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US654592A
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US1906417A
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US1918980A
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US1909308A
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US2098725A
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US2352732A
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US2440487A
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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) | 1954-03-12 | 1954-09-11 | 1955-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-12 | 1958-09-11 | 1959-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-12 | 1962-09-11 | 1963-03-13 | $7700.00 | Window Closed / Lapsed |