US4146026A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter mask
Assignee: Individual
•
Filing: 1977-03-15
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Granted: 1979-03-27
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Expires: 1997-03-15
Abstract
Abstract A filter mask characterized by a filter receptacle which carries a liquid, such as water, into which a plurality of air inlet tubes extend. Air is drawn through the liquid by reason of the vacuum caused by breathing, filtering the contamination, and then passes through an associated face mask. The filter mask effectively removes contaminates in the air, as various forms of dust, solid or semi-solid particles, pollen, chemicals and the like.
Inventors
- 👤 Victor H. Montalvo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:54
CPC Classifications
A; A62; A62B; A62B23/00; A62B23/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
A filter mask comprising a filter receptacle having a top portion and a bottom portion for receiving a liquid, a plurality of open-ended air inlet tubes having the same size inlet and outlet ends, said inlet ends mounted on and extending through said top portion in open communication with the surrounding atmosphere, said outlet ends extending to a position adjacent said bottom portion of said receptacle and thereby into said filter receptacle and into said liquid, air outlet tubes having first ends mounted on the top portion of said filter receptacle above the level of said liquid and communicating with the interior thereof, and a face mask, said face mask communicating with the other ends of said air outlet tubes in an air filtering path including said air inlet tubes and said liquid, and where the sum of the cross-sectional air flow areas of said air inlet tubes is at least equal to the air flow areas of said air outlet tubes.
Claim 2
Dependent Claim
162 words
A filter mask comprising a filter receptacle having a top portion and a bottom portion for receiving a liquid, a plurality of open-ended air inlet tubes having the same size inlet and outlet ends, said inlet ends mounted on and extending through said top portion in open communication with the surrounding atmosphere, said outlet ends extending to a position adjacent said bottom portion of said receptacle and thereby into said filter receptacle and into said liquid, air outlet tubes having first ends mounted on the top portion of said filter receptacle above the level of said liquid and communicating with the interior thereof, and a face mask, said face mask communicating with the other ends of said air outlet tubes in an air filtering path including said air inlet tubes and said liquid, and where the sum of the cross-sectional air flow areas of said air inlet tubes is at least equal to the air flow areas of said air outlet tubes.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-26 | 1982-09-25 | 1983-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-26 | 1986-09-25 | 1987-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-26 | 1990-09-25 | 1991-03-27 | $7700.00 | Window Closed / Lapsed |