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US3048959A
Expired / Lapsed
US
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Air cleaning device and method
Assignee: Novo Industrial Corp
•
Filing: 1959-10-27
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Granted: 1962-08-14
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Expires: 1979-10-27
Abstract
No abstract record available.
Inventors
- 👤 Wilfred W Lowther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:27
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/0039; B01D46/0041; B01D46/0046; B01D46/10; B01D46/24; B01D46/42; B01D46/48; B01D50/00; B01D50/20; F; F02; F02M; F02M35/00; F02M35/02; F02M35/022; F24; F24F; F24F8/00; F24F8/10; F24F8/108; Y; Y02; Y02A; Y02A50/00; Y02A50/20; Y02A50/2351; Y10; Y10S; Y10S55/00; Y10S55/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1665434A
Cited
US1712947A
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US2010456A
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US2226045A
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FR990710A
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CH247958A
Cited
FR1071848A
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US2692655A
Cited
AT210047B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-13 | 1966-02-12 | 1966-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-13 | 1970-02-12 | 1970-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-13 | 1974-02-12 | 1974-08-14 | $7700.00 | Window Closed / Lapsed |