Patent US3890966A successfully refreshed from Google Patents.
US3890966A
Expired / Lapsed
US
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Anti-fog surgical face mask with slits
Assignee: Johnson and Johnson
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Filing: 1973-11-01
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Granted: 1975-06-24
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Expires: 1993-11-01
Abstract
Abstract A surgical face mask comprising a filtration medium and a sheet of air impervious material, said sheet having slits which define flaps that are outwardly moveable under the influence of exhaled breath to provide paths for directing the flow of exhaled breath away from the eyes of the wearer of the mask.
Inventors
- 👤 Gary Bertil Aspelin
- 👤 Richard Francis Caffrey
- 👤 William Lauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:06
CPC Classifications
A; A41; A41D; A41D13/00; A41D13/05; A41D13/11; A41D13/1107; A41D13/1115
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
109 words
A surgical face mask comprising a body portion having upper and lower parts, said body portion comprising a filtration medium for filtering bacteria, means for securing the mask over the mouth and nose of the wearer, and a sheet of air impervious material secured to the upper part of said body portion, substantially the entire area of one major surface of said air impervious material overlying said body portion, said sheet of air impervious material having slits defining downwardly extending flaps which are outwardly movable under the influence of exhaled breath to provide paths for directing the flow of said exhaled breath away from the eyes of the wearer.
Claim 2
Dependent Claim
109 words
A surgical face mask comprising a body portion having upper and lower parts, said body portion comprising a filtration medium for filtering bacteria, means for securing the mask over the mouth and nose of the wearer, and a sheet of air impervious material secured to the upper part of said body portion, substantially the entire area of one major surface of said air impervious material overlying said body portion, said sheet of air impervious material having slits defining downwardly extending flaps which are outwardly movable under the influence of exhaled breath to provide paths for directing the flow of said exhaled breath away from the eyes of the wearer.
Claim 3
Dependent Claim
16 words
A face mask according to claim 1 wherein said slits define flaps having an arcuate configuration.
Claim 4
Dependent Claim
14 words
A face mask according to claim 2 wherein said slits are arranged in rows.
Claim 5
Dependent Claim
17 words
A face mask according to claim 3 wherein the slits in each row are arranged in pairs.
Claim 6
Dependent Claim
28 words
A face mask according to claim 1 wherein said slits are generally V-shaped, and define triangular flaps whose apices are directed toward the lower part of the mask.
Claim 7
Dependent Claim
13 words
A face mask according to claim 1 wherein said slits define rectangular flaps.
Claim 8
Dependent Claim
14 words
A face mask according to claim 1 wherein said slits define modified rectangular flaps.
Claim 9
Dependent Claim
57 words
A face mask according to claim 1 wherein said slits define flaps having three sides, one of said three sides being substantially horizontally disposed and the other two of said three sides being generally vertically disposed, each of said other two sides forming an angle of from about 90* to about 135* with said horizontally disposed side.
References Cited (Backward Citations)
US2655656A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |