1
James E Springett, Leonard W Barrett: Respirator having thermochromic fit-indicating seal. Minnesota Mining and Manufacturing Company, Gary L Griswold, Walter N Kirn, Karl G Hanson, April 8, 1997: US05617849 (84 worldwide citation)

Respirator 10 has a respirator body 11 that is configured to fit over the nose and mouth of a wearer. A thermochromic material 18 is positioned on the respirator body 11 such that the thermochromic material 18 makes thermal contact with the wearer's face when the respirator 10 is worn. The contact c ...


2
Seyed Abolhassan Angadjivand, James E Springett, Thomas I Insley: Crush resistant filtering face mask. 3M Innovative Properties Company, Karl G Hanson, August 2, 2005: US06923182 (57 worldwide citation)

A filtering face mask that includes a mask body that is adapted to fit over the nose and mouth of a person and a harness that is attached to the mask body. The mask body comprises i) a first shaping layer that has been molded; ii) a second shaping layer that has been molded; iii) a filtration layer ...


3
John M Brandner, William J Kopecky, Seyed A Angadjivand, James E Springett, Timothy J Lindquist: Monocomponent monolayer meltblown web and meltblowing apparatus. 3M Innovative Properties Company, Kenneth B Wood, March 8, 2011: US07902096 (43 worldwide citation)

A porous monocomponent nonwoven web contains a bimodal mass fraction/fiber size mixture of intermingled continuous microfibers and larger size fibers of the same polymeric composition. There are at least five times as many microfibers as larger size fibers, and a histogram of the mass fraction of fi ...


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James E Springett, Leonard W Barrett, Roberta C Harper: Molded respirator containing sorbent particles. 3M Innovative Properties Company, David R Cleveland, August 15, 2000: US06102039 (22 worldwide citation)

Molded respirators containing an air-permeable, sorbent-particle-containing layer between air-permeable particle-retaining layers. The particle-containing layer is stretchable during shaping without tearing or significant loss of particles. At least some of the fibers in the particle-containing laye ...


6
James E Springett, Leonard W Barrett, Roberta C Harper: Molded respirator containing sorbent particles. 3M Innovative Properties Company, David R Cleveland, May 22, 2001: US06234171 (15 worldwide citation)

Molded respirators containing an air-permeable, sorbent-particle-containing layer between air-permeable particle-retaining layers. The particle-containing layer is stretchable during shaping without tearing or significant loss of particles. At least some of the fibers in the particle-containing laye ...


7
Andrew R Fox, John D Stelter, Seyed A Angadjivand, Timothy J Lindquist, John M Brandner, James E Springett: Pleated filter with bimodal monolayer monocomponent media. 3M Innovative Properties Company, Kenneth B Wood, July 13, 2010: US07754041 (8 worldwide citation)

A pleated filter is made from a monocomponent monolayer nonwoven web containing a bimodal mass fraction/fiber size mixture of intermingled larger size and smaller size continuous monocomponent polymeric fibers of the same polymeric composition. Rows of pleats are formed in the nonwoven web, and the ...


8
Seyed A Angadjivand, Andrew R Fox, John D Stelter, Timothy J Lindquist, John M Brandner, James E Springett: Molded monocomponent monolayer respirator with bimodal monolayer monocomponent media. 3M Innovative Properties Company, Kenneth B Wood, December 28, 2010: US07858163 (3 worldwide citation)

A molded respirator is made from a monocomponent monolayer nonwoven web containing a bimodal mass fraction/fiber size mixture of intermingled continuous monocomponent polymeric microfibers and larger size fibers of the same polymeric composition. The respirator is a cup-shaped porous monocomponent m ...


9
Seyed A Angadjivand, Marvin E Jones, James E Springett, John M Brandner, Timothy J Lindquist: Method for making shaped filtration articles. 3M Innovative Properties Company, Kenneth B Wood, October 4, 2011: US08029723 (2 worldwide citation)

Shaped filtration articles are made from a monocomponent nonwoven web formed by flowing first and second fiber-forming materials of the same polymeric composition through first and second die cavities in respective fluid communication with first and second sets of orifices in a meltblowing die tip. ...


10
John M Brandner, William J Kopecky, Seyed A Angadjivand, James E Springett, Timothy J Lindquist: Process of making a monocomponent non-woven web. 3M Innovative Properties Company, Kenneth B Wood, August 13, 2013: US08506871 (1 worldwide citation)

A porous monocomponent nonwoven web contains a bimodal mass fraction/fiber size mixture of intermingled continuous microfibers and larger size fibers of the same polymeric composition. There are at least five times as many microfibers as larger size fibers, and a histogram of the mass fraction of fi ...