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Resilient shape-retaining fibrous filtration face mask    
United States Patent4807619   
Link to this pagehttp://www.wikipatents.com/4807619.html
Inventor(s)Dyrud; James F. (New Richmond, WI); Berg; Harvey J. (St. Paul, MN); Murray; Alice C. (Maplewood, MN)
AbstractNew molded fibrous filtration face masks that are highly resilient and shape-retaining are provided using one or more molded fibrous shaping layers, with a fibrous filtration layer disposed on one side of or between the molded fibrous shaping layers; the molded fibrous shaping layers having a total basis weight of at least 150 g/m2, and at least one of the fibrous shaping layers having an average density over the central area of the face mask of no greater than about 0.2 g/cc, such that at bends of the layer during deformation of the face mask the layer elastically deforms and tends to return to its original thickness and shape when the deforming pressure is removed.
   














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Patent Text Patent PDF Print Page Summary File History
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Inventor     Dyrud; James F. (New Richmond, WI); Berg; Harvey J. (St. Paul, MN); Murray; Alice C. (Maplewood, MN)
Owner/Assignee     Minnesota Mining and Manufacturing Company (St. Paul, MN)
Patent assignment
All assignments
Publication Date     February 28, 1989
Application Number     06/848,757
PAIR File History     Application Data   Transaction History
Image File Wrapper   Patent Term   Fees
Litigation
Filing Date     April 7, 1986
US Classification     128/206.16 128/206.19
Int'l Classification     A62B 007/10
Examiner     Howell; Kyle L.
Assistant Examiner     Sykes; Angela D.
Attorney/Law Firm     Sell; Donald M. Tamte; Roger R. ,
Address
Parent Case    
Priority Data    
USPTO Field of Search     128/205.27 128/28 128/29 128/30 128/31 128/32 128/33 128/34 128/35 128/36 128/37 128/38 128/39 128/40 128/41 128/42 128/43 128/44 128/45 128/46 128/47 128/48 128/49 128/50 128/51 128/52 128/53 128/54 128/55 128/56 128/57 128/58 128/59 128/60 128/61 128/62 128/63 128/64 128/65 128/66 128/67 128/68 128/69 128/70 128/71 128/72 128/73 128/74 128/75 128/76 128/77 128/78 128/79 128/80 128/81 128/82 128/83 128/84 128/85 128/86 128/87 128/88 128/89 128/90 128/91 128/92 128/93 128/94 128/95 128/96 128/97 128/98 128/99 128/100 128/101 128/102 128/103 128/104 128/105 128/106 128/107 128/108 128/109 128/110 128/111 128/112 128/113 128/114 128/115 128/116 128/117 128/118 128/119 128/120 128/121 128/122 128/123 128/124 128/125 128/126 128/127 128/128 128/129 128/130 128/131 128/132 128/133 128/134 128/135 128/136 128/137 128/138 128/139 128/140 128/141 128/142 128/143 128/144 128/145 128/146 128/147 128/148 128/149 128/150 128/151 128/152 128/153 128/154 128/155 128/156 128/157 128/158 128/159 128/160 128/161 128/162 128/163 128/164 128/165 128/166 128/167 128/168 128/169 128/170 128/171 128/172 128/173 128/174 128/175 128/176 128/177 128/178 128/179 128/180 128/181 128/182 128/183 128/184 128/185 128/186 128/187 128/188 128/189 128/190 128/191 128/192 128/193 128/194 128/195 128/196 128/197 128/198 128/199 128/200 128/201 128/202 128/203 128/204 128/205.29 128/206.27 128/28 128/29 128/30 128/31 128/32 128/33 128/34 128/35 128/36 128/37 128/38 128/39 128/40 128/41 128/42 128/43 128/44 128/45 128/46 128/47 128/48 128/49 128/50 128/51 128/52 128/53 128/54 128/55 128/56 128/57 128/58 128/59 128/60 128/61 128/62 128/63 128/64 128/65 128/66 128/67 128/68 128/69 128/70 128/71 128/72 128/73 128/74 128/75 128/76 128/77 128/78 128/79 128/80 128/81 128/82 128/83 128/84 128/85 128/86 128/87 128/88 128/89 128/90 128/91 128/92 128/93 128/94 128/95 128/96 128/97 128/98 128/99 128/100 128/101 128/102 128/103 128/104 128/105 128/106 128/107 128/108 128/109 128/110 128/111 128/112 128/113 128/114 128/115 128/116 128/117 128/118 128/119 128/120 128/121 128/122 128/123 128/124 128/125 128/126 128/127 128/128 128/129 128/130 128/131 128/132 128/133 128/134 128/135 128/136 128/137 128/138 128/139 128/140 128/141 128/142 128/143 128/144 128/145 128/146 128/147 128/148 128/149 128/150 128/151 128/152 128/153 128/154 128/155 128/156 128/157 128/158 128/159 128/160 128/161 128/162 128/163 128/164 128/165 128/166 128/167 128/168 128/169 128/170 128/171 128/172 128/173 128/174 128/175 128/176 128/177 128/178 128/179 128/180 128/181 128/182 128/183 128/184 128/185 128/186 128/187 128/188 128/189 128/190 128/191 128/192 128/193 128/194 128/195 128/196 128/197 128/198 128/199 128/200 128/201 128/202 128/203 128/204 128/205.19 128/206.24 2/9 2/206 162/157.1 162/2 162/3 162/4 162/5 162/6 162/7 162/8 162/9 162/10 162/11 162/12 162/13 162/14 162/15 162/16 162/17 162/18 162/19 162/20 162/21 162/22 162/23 162/24 162/25 162/26 162/27 162/28 162/29 162/30 162/31 162/32 162/33 162/34 162/35 162/36 162/37 162/38 162/39 162/40 162/41 162/42 162/43 162/44 162/45 162/46 162/47 162/48 162/49 162/50 162/51 162/52 162/53 162/54 162/55 162/56 162/57 162/58 162/59 162/60 162/61 162/62 162/63 162/64 162/65 162/66 162/67 162/68 162/69 162/70 162/71 162/72 162/73 162/74 162/75 162/76 162/77 162/78 162/79 162/80 162/81 162/82 162/83 162/84 162/85 162/86 162/87 162/88 162/89 162/90 162/91 162/92 162/93 162/94 162/95 162/96 162/97 162/98 162/99 162/100 162/101 162/102 162/103 162/104 162/105 162/106 162/107 162/108 162/109 162/110 162/111 162/112 162/113 162/114 162/115 162/116 162/117 162/118 162/119 162/120 162/121 162/122 162/123 162/124 162/125 162/126 162/127 162/128 162/129 162/130 162/131 162/132 162/133 162/134 162/135 162/136 162/137 162/138 162/139 162/140 162/141 162/142 162/143 162/144 162/145 162/146 162/147 162/148 162/149 162/150 162/151 162/152 162/153 162/154 162/155 162/156 162/157.3 428/224 428/284 428/286.7
Patent Tags     resilient shape-retaining fibrous filtration face mask
   
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3316904



[0 after 0 votes]		3595731



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3603315



[0 after 0 votes]		3613678



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3688768



[0 after 0 votes]		4628927
Ward
128/206.17
Dec,1986
[0 after 0 votes]
4551378
Carey, Jr.
428/198
Nov,1985
[0 after 0 votes]		4547420
Krueger
442/347
Oct,1985
[0 after 0 votes]
4536440
Berg
442/346
Aug,1985
[0 after 0 votes]		4323063
Fisichella
128/863
Apr,1982
[0 after 0 votes]
4300549
Parker
128/206.19
Nov,1981
[0 after 0 votes]		4215682
Kubik
128/205.29
Aug,1980
[0 after 0 votes]
4118531
Hauser
442/344
Oct,1978
[0 after 0 votes]		3620214
Thomas Thackston (Florham Park, NJ)
428/110
Nov,1971
[0 after 0 votes]
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