Assignee
HENGST SE
DE24 patents
Top patents by PatentIndex Score
US10357728B2Jul 23, 2019
Filter having a filter bypass valve, and filter insert therefor
HENGST SE11 citations84
US12589339B2Mar 31, 2026
Oil filter cartridge
HENGST SE0 citations62
USRE50552EAug 26, 2025
Filter with a replaceable filter insert
HENGST SE0 citations62
US12214302B2Feb 4, 2025
Oil filter cartridge
HENGST SE0 citations62
US12053727B2Aug 6, 2024
Oil filter cartridge
HENGST SE1 citations62
US11033842B2Jun 15, 2021
Filter insert for a filter having a filter bypass valve, and a method of using the filter insert
HENGST SE0 citations62
US10539052B2Jan 21, 2020
Oil filter cartridge and housing for an oil filter cartridge
HENGST SE1 citations62
US11440027B2Sep 13, 2022
Method for operating a centrifugal separator
HENGST SE0 citations55
US12478901B2Nov 25, 2025
Fluid filter and housing for the fluid filter
HENGST SE0 citations52
US11596883B2Mar 7, 2023
Fluid filter with a valve unit and filter element for use in the fluid filter
HENGST SE0 citations52
US11491425B2Nov 8, 2022
Fluid filter and filter insert for the same
HENGST SE0 citations52
US10576401B2Mar 3, 2020
Fluid filter with a valve unit
HENGST SE0 citations52
US12358003B2Jul 15, 2025
Cabin air filter device and components
HENGST SE0 citations50
US12465926B2Nov 11, 2025
Cabin air filter with polarisation
HENGST SE0 citations49
US12128343B2Oct 29, 2024
Filter arrangement and method
HENGST SE0 citations49
US11428130B2Aug 30, 2022
Pressure-limiting valve
HENGST SE0 citations42
US10801377B2Oct 13, 2020
Method for protecting a rotation separator from icing and a rotation separator
HENGST SE0 citations42
US10463996B2Nov 5, 2019
Filter which can be attached to a connection flange and filter insert for said filter
HENGST SE0 citations42
US11519309B2Dec 6, 2022
Separator plate for an oil mist separator and oil mist separator
HENGST SE0 citations37
US12244041B2Mar 4, 2025
Method for the continuous treatment of multiphase fluid flows
HENGST SE0 citations36
US11453015B2Sep 27, 2022
Rotor for a centrifugal separator and centrifugal separator
HENGST SE0 citations36
US11130079B2Sep 28, 2021
Filter insert of a fuel filter, filter insert, and fuel filter
HENGST SE0 citations36
US12564805B2Mar 3, 2026
Filter insert for a fuel filter with three-stage filtration
HENGST SE0 citations31
US10427170B2Oct 1, 2019
Rotor of a centrifugal separator with axially assembled elements clamped by a spring
HENGST SE0 citations22