Patent US4469097A successfully refreshed from Google Patents.
US4469097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Medical breathing apparatus
Assignee: Individual
•
Filing: 1982-05-25
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Granted: 1984-09-04
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Expires: 2002-05-25
Abstract
Abstract Medical breathing apparatus which provides repeated short bursts of oxygen separated by longer intervals of time to the wearer of a surgical mask to supplement his breathing.
Inventors
- 👤 Charles D. Kelman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:26
CPC Classifications
A; A62; A62B; A62B7/00; A62B7/02; A41; A41D; A41D13/00; A41D13/05; A41D13/11
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
83 words
Medical breathing apparatus comprising: a surgical mask; a container for pressurized gas; means for coupling said surgical mask to said container; and valve means automatically opened periodically by the pressurized gas in said container for repeated short intervals of time separated by longer intervals of time for dispensing gas in bursts from said container to said surgical mask, whereby said short and longer intervals of time are determined by said valve means independently of the breathing cycle of the wearer of the mask.
Claim 2
Dependent Claim
83 words
Medical breathing apparatus comprising: a surgical mask; a container for pressurized gas; means for coupling said surgical mask to said container; and valve means automatically opened periodically by the pressurized gas in said container for repeated short intervals of time separated by longer intervals of time for dispensing gas in bursts from said container to said surgical mask, whereby said short and longer intervals of time are determined by said valve means independently of the breathing cycle of the wearer of the mask.
Claim 3
Dependent Claim
21 words
Apparatus in accordance with claim 1 in which said container is a mobile container which may be worn by a surgeon.
Claim 4
Dependent Claim
18 words
Apparatus in accordance with claim 1 in which said surgical mask is primarily of a transparent plastic material.
Claim 5
Dependent Claim
42 words
Apparatus in accordance with claim 3 in which said mask is rigid and which further comprises air inlet and outlet means for admitting and expelling, respectively, from and to a region away from the operating field, the air breathed by the surgeon.
Claim 6
Dependent Claim
12 words
Apparatus in accordance with claim 1 in which said gas is oxygen.
Claim 7
Dependent Claim
17 words
Apparatus in accordance with claim 1 which includes means for supporting the container on a surgeon's body.
Claim 8
Dependent Claim
32 words
Apparatus in accordance with claim 1 in which said valve means is operable to be open for repeated short intervals of approximately one second separated by longer intervals of approximately twenty seconds.
Claim 9
Dependent Claim
77 words
Medical breathing apparatus comprising: a surgical gauze mask; a container for pressurized gas; means for coupling said surgical mask to said container; and valve means operable to be open for repeated short intervals of time separated by longer intervals of time for dispensing gas in bursts from said container to said surgical mask, said short and longer intervals of time being determined by said valve means independently of the breathing cycle of the wearer of the mask.
Claim 10
Dependent Claim
77 words
Medical breathing apparatus comprising: a surgical gauze mask; a container for pressurized gas; means for coupling said surgical mask to said container; and valve means operable to be open for repeated short intervals of time separated by longer intervals of time for dispensing gas in bursts from said container to said surgical mask, said short and longer intervals of time being determined by said valve means independently of the breathing cycle of the wearer of the mask.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-09-04 | 1988-03-05 | 1988-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-04 | 1992-03-05 | 1992-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-04 | 1996-03-05 | 1996-09-04 | $7700.00 | Window Closed / Lapsed |