US3707966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Personal breathing masks
Assignee: Individual
•
Filing: 1971-02-25
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Granted: 1973-01-02
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Expires: 1991-02-25
Abstract
Abstract An appliance for warming or treating air for personal breathing. It has an upper face mask and a lower chest pad; and these units are connected by a flexible conduit. The chest pad is of cellular construction opening in the direction of the wearer''s body to receive heat from the same; and the face mask has inlet and outlet valves activated by inhalation and exhalation to draw warmed air from the chest pad and expel it from the face mask. The chest pad may be filled with a porous substance which filters atmospheric air or lends it a medicated content beneficial for respiratory ailments.
Inventors
- 👤 J Nebel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:25
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/10; A61M16/1075; A61M16/105; A61M16/106; A61M16/107; A61M2205/00; A61M2205/36; A61M2205/3613
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
77 words
A personal breathing appliance comprising a face mask with inhalation and exhalation chambers, a pad adapted to lie in front of the user''s body, and a conduit connecting the pad and the mask, the pad closed in front and formed of a series of apertured partitions defining a vertically spaced series of passages open at the rear to receive warmth from said body, and the bottom of the pad having openings for the entrance of atmospheric air.
Claim 2
Dependent Claim
77 words
A personal breathing appliance comprising a face mask with inhalation and exhalation chambers, a pad adapted to lie in front of the user''s body, and a conduit connecting the pad and the mask, the pad closed in front and formed of a series of apertured partitions defining a vertically spaced series of passages open at the rear to receive warmth from said body, and the bottom of the pad having openings for the entrance of atmospheric air.
Claim 3
Dependent Claim
48 words
The structure of claim 1, an inlet valve from said conduit in the rear inhalation chamber of the mask and responsive to Inhalation, outlet valve means in the front inhalation chamber of the mask and responsive to exhalation, and a vane between the valves to separate the chambers.
Claim 4
Dependent Claim
25 words
The structure of claim 1, a companion pad in back of the body, and top outlet means for the companion pad communicating with said conduit.
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) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |