US3722509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nasal filters
Assignee: Individual
•
Filing: 1971-01-05
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Granted: 1973-03-27
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Expires: 1991-01-05
Abstract
Abstract A nasal filter composed of companion pads of porous textile material, each pad secured in a reinforcing peripheral band. Outward base guards are carried by the pads to check their insertion into the nostrils beyond a prescribed extent. The pads are adapted for impregnation with a volatile solution, and valves are applied to the inner surfaces of the pads for the absorption of vapors from the solution on inhalation, but check the emission of such vapors on exhalation. Modified bands have perforations for the passage of vapors in outward direction on inhalation.
Inventors
- 👤 J Nebel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:49
CPC Classifications
A; A62; A62B; A62B23/00; A62B23/06
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
66 words
A nasal filter comprising a flat pair of pads of absorbent material arranged in edgewise companion relation, each pad adhesively secured in a peripheral reinforcing band, tapes connecting the facing portions of the bands at the lower edge thereof, the lower edge of each band being extended with a marginal enlargement, and a set of yieldable valve flaps applied to the upper face of each pad.
Claim 2
Dependent Claim
66 words
A nasal filter comprising a flat pair of pads of absorbent material arranged in edgewise companion relation, each pad adhesively secured in a peripheral reinforcing band, tapes connecting the facing portions of the bands at the lower edge thereof, the lower edge of each band being extended with a marginal enlargement, and a set of yieldable valve flaps applied to the upper face of each pad.
Claim 3
Dependent Claim
24 words
The structure of claim 1, and each flap directed with a neck portion inwardly from the pad periphery to terminate with a head portion.
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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |