Dust removal device

Air filter material using laminated electret nonwoven fabric

Method and apparatus for electric

Air filter formed by slit and expanded layers of electrostatically enhanced material

Static dissipative filtration media

Method and apparatus for electric treatment of substrates

Method and apparatus for electric treatment of substrates

Static dissipative filtration media

Air filter formed from slit and expanded layers of electrostatically enhanced material

Dust collection device for sanding tool

Filtration media having a slit-film layer

Vehicle passenger compartment air filter devices

METHOD OF OPERATING AN ELECTROSTATIC AIR CLEANING DEVICE

Recirculation filter

Product and method of forming a gradient density fibrous filter

ELECTRET ARTICLE HAVING HETEROATOMS AND LOW FLUOROSATURATION RATIO

Conductive bead active field polarized media air cleaner

Electrets and compounds useful in electrets

Self-supporting pleated filter

Drinking water filtration device

Electrostatic air filter

Conducting gas purification filter and filter assembly

Method and apparatus for electric treatment of substrates

Electret article having heteroatoms and low fluorosaturation ratio

Electret article having high fluorosaturation ratio

Method of forming self-supporting pleated filter media

Pillow with air filter

Microimpactor system having optimized impactor spacing

Composite filter media

Method and apparatus for spinning a web of mixed fibers, and products produced therefrom

Wrought fiber sheet and filter unit

Personal inhalation filter

Electrostatic air cleaning device