Patent US4832017A successfully refreshed from Google Patents.
US4832017A
Expired / Lapsed
US
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Breathing mask
Assignee: Draegerwerk AG and Co KGaA
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Filing: 1987-03-27
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Granted: 1989-05-23
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Expires: 2007-03-27
Abstract
Abstract A breathing mask has an elastic molded body which has area zones of materials of different hardnesses. This breathing mask is improved such that even with a one-piece molded configuration of the breathing mask, area zones of different hardness and constant wall thickness are provided. For this purpose, area zones integrated into the molded body are reinforced differently by means of a partial heat treatment.
Inventors
- 👤 Christian Schnoor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:40
CPC Classifications
A; A62; A62B; A62B18/00; A62B18/02; A62B18/025; A61; A61M; A61M16/00; A61M16/06; A61M16/0605; A61M16/0616; A62B9/00; A62B9/02; B; B29; B29C; B29C71/00; B29C71/04; B29C35/00; B29C35/02; B29C35/08; B29C35/0805; B29C2035/0844; B29L; B29L2031/00; B29L2031/48; B29L2031/4807; B29L2031/4835
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
107 words
A breathing mask comprising: an elastic preformed body made of only a single piece of mask material; said elastic body having a first region for contact engaging the face of the wearer, said first region having a predetermined first degree of stiffness; said elastic body having a second region adjacent said first region; said second region having a second degree of stiffness greater than the stiffness of said first region, said second degree of stiffness being imparted to said second region by a partial hardening treatment utilizing energetic radiation; and, said regions of said body having substantially the same wall thickness irrespective of said degrees of stiffness.
Claim 2
Dependent Claim
107 words
A breathing mask comprising: an elastic preformed body made of only a single piece of mask material; said elastic body having a first region for contact engaging the face of the wearer, said first region having a predetermined first degree of stiffness; said elastic body having a second region adjacent said first region; said second region having a second degree of stiffness greater than the stiffness of said first region, said second degree of stiffness being imparted to said second region by a partial hardening treatment utilizing energetic radiation; and, said regions of said body having substantially the same wall thickness irrespective of said degrees of stiffness.
Claim 3
Dependent Claim
14 words
The breathing mask of claim 1, said elastic formed body being made of plastic.
Claim 4
Dependent Claim
92 words
A breathing mask comprising: an elastic preformed body made of only a single piece of mask material; said elastic body having a first region for contact engaging the face of the wearer, said first region having a predetermined first degree of stiffness; said elastic body having a second region adjacent said first region; said second region having a second degree of stiffness different than the stiffness of said first region; and, one of said degrees of stiffness being imparted to the region corresponding thereto by a partial hardening treatment utilizing energetic radiation.
Claim 5
Dependent Claim
92 words
A breathing mask comprising: an elastic preformed body made of only a single piece of mask material; said elastic body having a first region for contact engaging the face of the wearer, said first region having a predetermined first degree of stiffness; said elastic body having a second region adjacent said first region; said second region having a second degree of stiffness different than the stiffness of said first region; and, one of said degrees of stiffness being imparted to the region corresponding thereto by a partial hardening treatment utilizing energetic radiation.
Claim 6
Dependent Claim
23 words
The breathing mask of claim 3, said portions of said body having substantially the same wall thickness irrespective of said degrees of stiffness.
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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) | 1992-05-22 | 1992-11-21 | 1993-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-22 | 1996-11-21 | 1997-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-22 | 2000-11-21 | 2001-05-23 | $7700.00 | Window Closed / Lapsed |