Patents by Inventor David Keerl

David Keerl has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • ANTI-MICROBIAL, ANTI-ALLERGENIC BIO-FUNCTIONAL AIR FILTER MEDIUM AND AIR FILTER ELEMENT
    Publication number: 20220305417
    Abstract: A bio-functional air filter medium is provided with a at least one particle filtration layer that retains particles and at least one bio-functional carrier coated with or having embedded therein antimicrobial, anti-viral and anti-allergenic materials. An air filter element having the bio-functional air filter medium is also disclosed. The bio-functional air filter medium is adapted to bind and capture allergens and block metabolism of bacteria, and provide anti-viral activity to effectively inhibit/deactivate viruses, all while filtering air in high flow, low pressure drop residential, HVAC or air purifier applications.
    Type: Application
    Filed: April 21, 2022
    Publication date: September 29, 2022
    Inventors: Nilesh THARVAL, David KEERL, Andreas SCOPE, Annette LUZIUS
  • ANTI-MICROBIAL, ANTI-ALLERGENIC BIO-FUNCTIONAL AIR FILTER MEDIUM FOR RESIDENTIAL AIR FILTRATION AND AIR FILTER ELEMENT
    Publication number: 20220047978
    Abstract: A bio-functional air filter medium is provided with a first filter layer that retains particles and at least one bio-functional carrier coated with or having embedded therein antimicrobial material and an anti-allergenic material. An air filter element having the bio-functional air filter medium is also disclosed. The bio-functional air filter medium is adapted to bind and capture allergens and block metabolism of bacteria while filtering air in high flow, low pressure drop residential or HVAC applications.
    Type: Application
    Filed: August 13, 2020
    Publication date: February 17, 2022
    Inventors: Nilesh Tharval, David Keerl, Andreas Scope, Annette Schenk
  • Filter medium, filter element and filter arrangement
    Patent number: 10300419
    Abstract: A filter medium is provided with a first filter layer that retains particles and a second filter layer provided with an antimicrobial material and an anti-allergenic material. The anti-allergenic material contains polyphenols. The filter medium is designed particularly for filtering air for the passenger compartment of motor vehicles.
    Type: Grant
    Filed: June 18, 2016
    Date of Patent: May 28, 2019
    Assignee: MANN+HUMMEL GmbH
    Inventors: Andreas Scope, Alexander Piry, David Keerl
  • Filter Medium, Filter Element and Filter Arrangement
    Publication number: 20160296871
    Abstract: A filter medium is provided with a first filter layer that retains particles and a second filter layer provided with an antimicrobial material and an anti-allergenic material. The anti-allergenic material contains polyphenols. The filter medium is designed particularly for filtering air for the passenger compartment of motor vehicles.
    Type: Application
    Filed: June 18, 2016
    Publication date: October 13, 2016
    Inventors: Andreas Scope, Alexander Piry, David Keerl