US4821340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Face shield
Assignee: Individual
•
Filing: 1988-02-08
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Granted: 1989-04-18
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Expires: 2008-02-08
Abstract
Abstract A face shield to protect an individual against inhaling germs and other foreign bodies comprising a permanent clip portion which is adapted to be mounted on the nose piece of a pair of eyeglasses and a disposable sheet of relatively thin rigid plastic which is removably attached to the clip. This enables the sheet to be removed and discarded after a single use and replaced by an identical sheet prior to treatment of a new patient.
Inventors
- 👤 April E. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:40
CPC Classifications
A; A41; A41D; A41D13/00; A41D13/05; A41D13/11; A41D13/1184; A61; A61F; A61F9/00; A61F9/02; A61F9/029
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
159 words
A face shield to protect an individual against inhaling germs and other foreign bodies, comprising: (a) a sheet of substantially rigid material having a lower portion which has a width which is substantially equal to the width of a conventional pair of eyeglasses and an upper edge and a tab which extends upwardly from a mid-point of said upper edge, said tab being substantially narrower than said lower portion, (b) a clip having a rearwardly extending hook-shaped flange for removably mounting the clip on the nosepiece of a pair of eyeglasses, said clip having a downwardly extending flange which extends in front of said nosepiece, and (c) mounting means for removably attaching said tab to said downwardly extending flange so that said sheet lies in front of the nose and mouth of the individual and substantially below at least a major portion of the lenses of the eyeglasses and said tab is substantially between the lenses of the eyeglasses.
Claim 2
Dependent Claim
159 words
A face shield to protect an individual against inhaling germs and other foreign bodies, comprising: (a) a sheet of substantially rigid material having a lower portion which has a width which is substantially equal to the width of a conventional pair of eyeglasses and an upper edge and a tab which extends upwardly from a mid-point of said upper edge, said tab being substantially narrower than said lower portion, (b) a clip having a rearwardly extending hook-shaped flange for removably mounting the clip on the nosepiece of a pair of eyeglasses, said clip having a downwardly extending flange which extends in front of said nosepiece, and (c) mounting means for removably attaching said tab to said downwardly extending flange so that said sheet lies in front of the nose and mouth of the individual and substantially below at least a major portion of the lenses of the eyeglasses and said tab is substantially between the lenses of the eyeglasses.
Claim 3
Dependent Claim
40 words
A face shield as recited in claim 1, wherein said mounting means comprises: (a) a forwardly extending protrusion on said downwardly extending flange, and (b) a rearwardly facing cavity on said tab for receiving said protrusion in a snap fit.
Claim 4
Dependent Claim
17 words
A face shield as recited in claim 1, wherein said sheet is made of a transparent plastic.
Claim 5
Dependent Claim
16 words
A face shield as recited in claim 3 wherein said clip is made of transparent plastic.
Claim 6
Dependent Claim
19 words
A face shield as recited in claim 4, wherein said sheet is substantially thinner in cross-section than said clip.
Claim 7
Dependent Claim
20 words
A face shield as recited in claim 5, wherein said flange is at least twice as thick as said sheet.
Claim 8
Dependent Claim
20 words
A face shield as recited in claim 6, wherein said flange is approximately three times as thick as said sheet.
Claim 9
Dependent Claim
43 words
A face shield as recited in claim 1, wherein the upper edge of the lower portion of the sheet has an upwardly curving bulge behind the lower portion of each lense of the eyeglasses, each of said bulges being spaced from said tab.
Claim 10
Dependent Claim
133 words
A face shield to protect an individual against inhaling germs, and other foreign bodies, comprising: (a) a sheet of substantially rigid material having an upper edge and a tab which extends upwardly from a mid-point of said upper edge, said tab having a top edge, (b) a clip having a rearwardly extending hook-shaped flange for removably mounting the clip on the nosepiece of a pair of eyeglasses, said clip having a downwardly extending flange which extends in front of said nosepiece, and (c) mounting means for removably attaching said tab to said downwardly extending flange so that said sheet lies in front of the nose and mouth of the individual, said mounting means comprising a forwardly extending projection which has a downwardly facing vertical slot for receiving the top edge of said tab.
Claim 11
Dependent Claim
133 words
A face shield to protect an individual against inhaling germs, and other foreign bodies, comprising: (a) a sheet of substantially rigid material having an upper edge and a tab which extends upwardly from a mid-point of said upper edge, said tab having a top edge, (b) a clip having a rearwardly extending hook-shaped flange for removably mounting the clip on the nosepiece of a pair of eyeglasses, said clip having a downwardly extending flange which extends in front of said nosepiece, and (c) mounting means for removably attaching said tab to said downwardly extending flange so that said sheet lies in front of the nose and mouth of the individual, said mounting means comprising a forwardly extending projection which has a downwardly facing vertical slot for receiving the top edge of said tab.
Claim 12
Dependent Claim
32 words
A face shield as recited in claim 9, wherein said upper edge has an upwardly curving bulge behind each lens of the eyeglasses, each of said bulges being spaced from said tab.
References Cited (Backward Citations)
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Cited
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Cited
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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) | 1992-04-17 | 1992-10-17 | 1993-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-17 | 1996-10-17 | 1997-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-17 | 2000-10-17 | 2001-04-18 | $7700.00 | Window Closed / Lapsed |