Patent US4038979A successfully refreshed from Google Patents.
US4038979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sanitary face mask
Assignee: Individual
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Filing: 1975-08-27
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Granted: 1977-08-02
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Expires: 1995-08-27
Abstract
Abstract In one embodiment of the present invention, a frame defining a face mask is disclosed having a flexible transparent disposable filter material removably retained about the frame. Another embodiment of the present invention discloses an elastomeric frame which tapers to a feathered edge at the periphery intended to contact the face, said elastomeric frame engaging a transparent facial insert, which insert includes means for removably retaining filter material. The mask is further provided with a disposable sanitary perforated bag-shaped web which envelops the frame and transparent facial insert to protect the exposed surfaces thereof from contamination while allowing the user to breathe freely.
Inventors
- 👤 Doris C. McCosker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:31
CPC Classifications
A; A41; A41D; A41D13/00; A41D13/05; A41D13/11; A41D13/1184; A45; A45D; A45D44/00; A45D44/12; Y; Y10; Y10S; Y10S128/00; Y10S128/909
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
255 words
In a sanitary face mask having a transparent facial insert for shielding at least the eyes, nose and mouth of the user, the improvement wherein said mask further comprises a tri-lateral elastomeric frame having a first perimeter, and a second perimeter spaced apart from the first perimeter and providing substantial depth to said frame, said frame comprising first and second sides of equal length which join in a curved bottom portion, said second perimeter substantially parallel to said first perimeter along said first and second sides, said bottom portion providing a means for positively locating said mask during use whereby said bottom portion engages the underside of the chin of said user, said frame further comprising a third side, which joins with said first and second sides of said frame to form the top portion of said frame which is spaced apart from said bottom portion, said sides of said frame forming a taper which terminates in a continuous feathered edge along said first perimeter, said third side having a depth of concave shape which, at its smallest point, is between 30 and 70 percent of the maximum depth of said first side, said frame further including handle portion comprised of a lateral extension of said frame, said handle portion for manually supporting said mask, said handle portion joining said bottom portion, said handle portion being spaced apart from said first perimeter by at least 30 percent of the depth of said bottom portion and said first, second and third sides being of one-piece construction.
Claim 2
Dependent Claim
255 words
In a sanitary face mask having a transparent facial insert for shielding at least the eyes, nose and mouth of the user, the improvement wherein said mask further comprises a tri-lateral elastomeric frame having a first perimeter, and a second perimeter spaced apart from the first perimeter and providing substantial depth to said frame, said frame comprising first and second sides of equal length which join in a curved bottom portion, said second perimeter substantially parallel to said first perimeter along said first and second sides, said bottom portion providing a means for positively locating said mask during use whereby said bottom portion engages the underside of the chin of said user, said frame further comprising a third side, which joins with said first and second sides of said frame to form the top portion of said frame which is spaced apart from said bottom portion, said sides of said frame forming a taper which terminates in a continuous feathered edge along said first perimeter, said third side having a depth of concave shape which, at its smallest point, is between 30 and 70 percent of the maximum depth of said first side, said frame further including handle portion comprised of a lateral extension of said frame, said handle portion for manually supporting said mask, said handle portion joining said bottom portion, said handle portion being spaced apart from said first perimeter by at least 30 percent of the depth of said bottom portion and said first, second and third sides being of one-piece construction.
Claim 3
Dependent Claim
27 words
The invention of claim 1 wherein the depth of said third side at its smallest point is 50 percent of the maximum depth of said first side.
Claim 4
Dependent Claim
27 words
The invention of claim 1 wherein said face mask further comprises a disposable perforated bag-shaped web for enclosing said face mask along said first and second perimeters.
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) | 1980-08-01 | 1981-01-31 | 1981-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-01 | 1985-01-31 | 1985-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-01 | 1989-01-31 | 1989-08-02 | $7700.00 | Window Closed / Lapsed |