US2272995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for cleanin air and other gases
Assignee: Individual
•
Filing: 1939-03-20
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Granted: 1942-02-10
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Expires: 1959-03-20
Abstract
Abstract 532,863. Washing air. ARMSTRONG, J. J. V. (Wittemeier, H.). Feb. 16, 1939, No. 5054. [Class 55 (ii)] The air is fed through a pipe 2, and is distributed by a guide member 3 fitted with vanes 4 and partly immersed in a liquid bath 5. The air panes through a grating 9 to damp circular motion, a filter 8, a dead space 10, and escapes through a pipe 12. The vanes are held between guide plates 3a, 3b, the latter extending substantially across the liquid bath. In a modification the guide is conical in formation, and is placed above the surface of the liquid. U.S.A. Specification 2,004,467 is referred to.
Inventors
- 👤 Neumann Willy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:36
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/02; B01D47/024; B01D47/027; B01D47/028; F; F02; F02M; F02M35/00; F02M35/02; F02M35/022; Y; Y10; Y10S; Y10S261/00; Y10S261/54; Y10S55/00; Y10S55/27
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1945-02-09 | 1945-08-11 | 1946-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-02-09 | 1949-08-11 | 1950-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-02-09 | 1953-08-11 | 1954-02-10 | $7700.00 | Window Closed / Lapsed |