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US4090510A Expired / Lapsed US ⏱️ 0.0 years remaining

Face mask with exchangeable filter

Assignee: REBO PRODUKTER
•
Filing: 1977-01-19
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Granted: 1978-05-23
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Expires: 1997-01-19
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Abstract

Abstract A facemask for covering the nose and mouth of a user including a perforated cover member made of leather, plastics, or another suitable material and having fastening devices opposingly secured at opposing peripheral edges thereof, an outside filter layer for intercepting coarse particles, an inside filter layer for intercepting fine particles and secured to the outside filter layer at an intermediate location thereof, each fastening device clamping the outside filter layer to the inside surface of the cover member, the inside filter layer also serving to protect the face of the wearer against the fastening device and a band secured to opposing peripheral edges of tee cover member for securing the mask to the face of the user.

Inventors

  • 👤 Goran Segersten

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 21:45
CPC Classifications
A; A41; A41D; A41D13/00; A41D13/05; A41D13/11

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 162 words
A facemask with a filter for intercepting particles of various sizes, comprising a perforated cup-shaped cover member for covering the nose and mouth of a user, an outside filter layer made of filter material for filtering coarse particles and shaped to fit within the inside surface of said cover member, an inside filter layer made of material for filtering fine particles and shaped to fit within said outside filter layer, said inside and outside filter layers being secured to each other at an intermediate location thereof, said cover member, said outside filter layer, and said inside filter layer having approximatery the same surface area, means for securing said facemask to the face of a user, said cover member including fastening means secured at opposing peripheral edges thereof, said fastening means clamping said outside filter layer against the inside surface of said cover member whereby, said inside filter layer covers said fastening means and protects the face of the user against contact thereof.
Claim 2
Dependent Claim 162 words
A facemask with a filter for intercepting particles of various sizes, comprising a perforated cup-shaped cover member for covering the nose and mouth of a user, an outside filter layer made of filter material for filtering coarse particles and shaped to fit within the inside surface of said cover member, an inside filter layer made of material for filtering fine particles and shaped to fit within said outside filter layer, said inside and outside filter layers being secured to each other at an intermediate location thereof, said cover member, said outside filter layer, and said inside filter layer having approximatery the same surface area, means for securing said facemask to the face of a user, said cover member including fastening means secured at opposing peripheral edges thereof, said fastening means clamping said outside filter layer against the inside surface of said cover member whereby, said inside filter layer covers said fastening means and protects the face of the user against contact thereof.

References Cited (Backward Citations)

US1579449A Cited
US2067026A Cited
US2296150A Cited
GB680339A Cited
US2681060A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1981-05-22 1981-11-21 1982-05-23 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1985-05-22 1985-11-21 1986-05-23 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1989-05-22 1989-11-21 1990-05-23 $7700.00 Window Closed / Lapsed

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