3m Innovative Properties Company

Thomas J Herbrand

Craig D Thompson

Perry S Dotterman

David James Prince

Judd D Olson

Glen O Gregerson

Michael J Kubes

Lou D Hibbard

Delphine Elisabeth Aubourg

Danielle M Schreppel

Carter Z Swift

Kristine K Krumhus

David J Prince

An air filter device including an air filter unit and an expansion unit. The air filter unit includes a filter media assembly maintained by an outer frame assembly. The outer frame assembly defines exterior length, width and depth dimensions of the air filter device in an initial state. The expansion unit provides one or more of an expanded length, width or depth in an expanded state of the air filter device. Portions or an entirety of the expansion unit can provided apart from the air filter unit in a deliver condition of the air filter device, or can be assembled to the air filter unit prior to delivery to a user. The air filter devices of the present disclosure are useful with a wide variety of differently size air handling devices, able to readily seal with an air handling device compartment via the expansion unit.

Air filter devices with gap sealing unit

Scouring article

Cleaning head for a cleaning tool

Growing community of inventors

Eagan, MN, United States of America

Thomas J Herbrand