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Paul E Marecki, Jeanine M Shusta, Matthew R Atkinson, Cheryl M Frey, Olester Benson Jr: Glittering cube-corner article. 3M Innovative Properties Company, Karl G Hanson, Stephen C Jenson, September 7, 1999: US05948488 (42 worldwide citation)

A glittering non-retroreflective sheeting 60 includes an array of cube-corner elements 30 that are arranged in the array such that the sheeting glitters when light is incident thereon. The glitter is in the form of many discrete points of light 68 that tend to blink off and on. The array may be conf ...


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Gerald M Brostrom, David M Castiglione, William A Mittelstadt, Alan J Solyntjes: Half-mask respirator with head harness assembly. 3M Innovative Properties Company, Karl G Hanson, Kevin W Raasch, May 11, 2004: US06732733 (42 worldwide citation)

A half-mask respirator is retained on a wearer's head by upper and lower straps and a strap support. The upper and lower straps connect to the strap support at upper and lower strap attachment points on each side of the strap support. The distances between the attachment points on each opposing ...


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William A Mittelstadt, David M Castiglione: Unidirectional respirator valve. 3M Innovative Properties Company, Michaele A Hakamaki, Karl G Hanson, Kevin W Raasch, April 26, 2005: US06883518 (42 worldwide citation)

A unidirectional valve, wherein the valve comprises a valve body including a frame, a valve opening through the frame, and a valve seat extending from the frame and at least partially surrounding the valve opening. The valve further includes a valve flap having a first portion attached to the frame ...


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Billy L George, Stefan A Babirad, Margaret M Nauman: Polysiloxane treated roofing granules. Minnesota Mining and Manufacturing Company, Gary L Griswold, Walter N Kirn, Karl G Hanson, August 31, 1993: US05240760 (42 worldwide citation)

Roofing granules having surfaces treated with a polysiloxane that has a long-chain hydrocarbon group bonded to a silicon atom on the polysiloxane backbone wherein the long-chain hydrocarbon group preferably is a straight or branched aliphatic group having 5 to 30 carbon atoms and the roofing granule ...


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Alan D Rousseau, Marvin E Jones, Seyed A Angadjivand: Fibrous webs useful for making electret filter media. Minnesota Mining and Manufacturing Company, Carole Truesdale, Karl G Hanson, October 19, 1999: US05968635 (41 worldwide citation)

Fibrous webs comprising a blend of a thermoplastic resin and at least one compound or oligomer which is ##STR1## wherein R.sub.f is a perfluorinated moiety which may contain one or more catenary ether oxygen atoms, Q is a linking group selected from alkylene groups having 1 or 2 carbon atoms, sulfon ...


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Thomas P Hedblom: Patterned skid preventative sheet. Minnesota Mining and Manufacturing Company, Gary L Griswold, Walter N Kirn, Karl G Hanson, July 13, 1993: US05227221 (41 worldwide citation)

A polymeric base sheet has a plurality of protuberances and valleys located on a first side of the base sheet. A layer of bonding material is located on a top surface of the protuberances and is substantially absent from the valleys located between the protuberances. A plurality of skid-preventative ...


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Jeanine M Shusta, Paul E Marecki, Matthew R Atkinson, Cheryl M Frey, Olester Benson Jr: Glittering cube-corner retroreflective sheeting. Minnesota Mining and Manufacturing Company, Karl G Hanson, November 24, 1998: US05840405 (40 worldwide citation)

A cube-corner retroreflective sheeting 60 includes an array of cube-corner elements 30 that are defined by three sets of intersecting parallel grooves 45, 46, 47. The cube-corner elements 30 are arranged in the array such that the sheeting 60 glitters when exposed to light. The glitter is in the for ...


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Bengt Kallman, Hans Olof Frojd: Process and device for flow control of an electrical motor fan. 3M Innovative Properties Company, William Bauer, Karl G Hanson, July 17, 2007: US07244106 (40 worldwide citation)

A method and configuration from maintaining a constant of air to a protective helmet (4) from a fan (3) in a battery powered fresh air unit. The fan (3) is a radial fan with a filter (5) positioned on the suction side of the fan and is operated by a brushless continuous current motor (2). With the a ...