US4297117A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Respiratory device for catastrophic fires and/or smog weather conditions
Assignee: Industrie-Wert Beteiligungsgesellschaft MbH
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Filing: 1979-06-19
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Granted: 1981-10-27
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Expires: 1999-06-19
Abstract
Abstract A fireproof respiratory face mask for use in fires and smog has a granular expanded calcium aluminum silicate base material coated with layers of soda lime, active carbon dust, copper dust soaked into a caustic soda solution and manganese dioxide dust held between two layers of ceramic fiber fleece-like materials felted together to hold the coated granules. The face mask is stored in an easy opening ceramic fiber fireproof package with a pair of fireproof gloves.
Inventors
- 👤 Heinz Holter
- 👤 Heinz Gresch
- 👤 Heinrich Igelbuscher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:30
CPC Classifications
A; A62; A62D; A62D9/00; Y; Y10; Y10S; Y10S55/00; Y10S55/35
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
73 words
A respiratory filter element for catastrophic fires and/or smog weather conditions characterized by a fleece-like material that is reinforced with adsorption materials comprising soda lime, active carbon dust, and either copper dust or manganese dioxide dust or both copper dust and manganese dioxide dust, and thus characterized in that the adsorption material is deposited on a base material made of expanded calcium-aluminum-silicate and that the base material is embedded in the fleece-like material.
Claim 2
Dependent Claim
73 words
A respiratory filter element for catastrophic fires and/or smog weather conditions characterized by a fleece-like material that is reinforced with adsorption materials comprising soda lime, active carbon dust, and either copper dust or manganese dioxide dust or both copper dust and manganese dioxide dust, and thus characterized in that the adsorption material is deposited on a base material made of expanded calcium-aluminum-silicate and that the base material is embedded in the fleece-like material.
Claim 3
Dependent Claim
70 words
A respiratory filter element according to claim 1 thus characterized that particles of the base material are surrounded with a layer of soda lime, a layer of active carbon, as well as either a layer of copper dust soaked in a caustic soda solution or a layer of manganese dioxide dust or both a layer of copper dust soaked in a caustic soda solution and a layer of manganese dioxide.
Claim 4
Dependent Claim
30 words
A respiratory filter element according to one of the claims 1-2 thus characterized that the manganese dioxide is produced from potassium permanganate and is reinforced with approximately 5% copper oxide.
Claim 5
Dependent Claim
22 words
A respiratory filter element according to one of the claims 1-2 thus characterized that the fleece-like material is made of ceramic fibers.
Claim 6
Dependent Claim
22 words
A respiratory filter element according to claim 1 characterized by a cloth with eye openings to be used as a face mask.
Claim 7
Dependent Claim
27 words
A respiratory filter element according to claim 1 thus characterized that said filter element is part of a fire protection escape package, which also contains fireproof gloves.
Claim 8
Dependent Claim
26 words
A respiratory filter element according to claim 6 thus characterized that this package is stored in an easy to open, fireproof parcel made of ceramic fibers.
Claim 9
Dependent Claim
39 words
A respiratory filter element according to claim 1 characterized by a second fleece-like material disposed on the first fleece-like material and holding therebetween the adsorption materials, with the fleece-like materials being linked with each other through the adsorption materials.
Claim 10
Dependent Claim
51 words
A respiratory filter element according to claim 1 further characterized by the fleece-like material including ceramic fibers, which fibers extend through the adsorption material and link fleece-like materials together and thus prevent the adsorption material from shifting relative to the fleece-like materials and from falling out from between the fleece-like materials.
Claim 11
Dependent Claim
119 words
A respiratory filter element comprising a cloth material configured for holding on a face and particularly about a nose and mouth for breathing air through the cloth material during escapes from catastrophic fires, the cloth material including plural parallel layers of fleece-like material and granular adsorption material held between the layers of fleece-like material, the layers of fleece-like material being linked through the granular material to prevent shifting of the granular material relative to the fleece-like material layers and to prevent the adsorption material from falling out from between the layers, wherein the granular adsorption material comprises an expanded base material with layers of soda lime, active carbon, copper dust soaked in a caustic soda solution and manganese dioxide.
Claim 12
Dependent Claim
119 words
A respiratory filter element comprising a cloth material configured for holding on a face and particularly about a nose and mouth for breathing air through the cloth material during escapes from catastrophic fires, the cloth material including plural parallel layers of fleece-like material and granular adsorption material held between the layers of fleece-like material, the layers of fleece-like material being linked through the granular material to prevent shifting of the granular material relative to the fleece-like material layers and to prevent the adsorption material from falling out from between the layers, wherein the granular adsorption material comprises an expanded base material with layers of soda lime, active carbon, copper dust soaked in a caustic soda solution and manganese dioxide.
Claim 13
Dependent Claim
15 words
The respiratory filter element according to claim 10 wherein the fleece-like material comprises ceramic fibers.
References Cited (Backward Citations)
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US2821261A
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US3196871A
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US3475189A
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US3971373A
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US4160059A
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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) | 1984-10-26 | 1985-04-27 | 1985-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-26 | 1989-04-27 | 1989-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-26 | 1993-04-27 | 1993-10-27 | $7700.00 | Window Closed / Lapsed |