US 12,286,345 B2
Filter assembly
Hannah L. Stoughton, Afton, MN (US); Tommie W. Kelley, Shoreview, MN (US); Windy A. Santa Cruz, Minneapolis, MN (US); Matthew W. Gorrell, South St. Paul, MN (US); John B. Stender, St. Paul, MN (US); Christine L. McCool, St. Paul, MN (US); Michael L. Elam, Woodland Hills, CA (US); Michael S. Schuffert, Chatsworth, CA (US); Jackson H. Hedden, Hoover, AL (US); Frank Tyneski, Austin, TX (US); and John M. Vernon, Malibu, CA (US)
Assigned to 3M Innovative Properties Company, St. Paul, MN (US)
Appl. No. 17/273,559
Filed by 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
PCT Filed Sep. 5, 2019, PCT No. PCT/IB2019/057505
§ 371(c)(1), (2) Date Mar. 4, 2021,
PCT Pub. No. WO2020/049507, PCT Pub. Date Jun. 12, 2020.
Claims priority of provisional application 62/728,577, filed on Sep. 7, 2018.
Prior Publication US 2021/0238032 A1, Aug. 5, 2021
Int. Cl. B28B 3/00 (2006.01); B01J 19/00 (2006.01); B82B 3/00 (2006.01); C12Q 1/6869 (2018.01)
CPC B82B 3/0004 (2013.01) [B01J 19/004 (2013.01); B82B 3/0076 (2013.01); C12Q 1/6869 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A filter assembly, comprising:
a filter media including a web having first and second major sides, a first major surface, and a thickness, the web including at least one of an oleophilic material or a fire retardant material; and
a filter frame, wherein the filter frame includes an overlay portion, the overlay portion covering, from a top plan view, at least 20% but no more than 80% of the first major surface by area,
wherein the overlay portion is continuous and defines a plurality of open areas,
wherein the overlay portion includes a material different from the filter media, and
wherein the overlay portion curves in the thickness direction of the filter assembly and includes at least one flat surface portion, the flat surface portion defined by having a radius of curvature greater than 10 cm along at least one direction.