Patents by Inventor Ritva Heikkinen

Ritva Heikkinen 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).

  • Substrate having porous sheet(s) for treating exhaust gases of combustion engines
    Patent number: 8337762
    Abstract: The object of the invention is a porous sheet(s) for treating exhaust gases of combustion engines in open channels. According to the invention at least part of the porous sheet has a covering support having pores over 10 nm and coarse particles over 1.4 ?m.
    Type: Grant
    Filed: May 17, 2011
    Date of Patent: December 25, 2012
    Assignee: Ecocat Oy
    Inventors: Aulis Vakkilainen, Reijo Lylykangas, Ritva Heikkinen, Teuvo Maunula, Matti Harkonen, Ari Lievonen
  • SUBSTRATE HAVING POROUS SHEET(S) FOR TREATING EXHAUST GASES OF COMBUSTION ENGINES
    Publication number: 20110217215
    Abstract: The object of the invention is a porous sheet(s) for treating exhaust gases of combustion engines in open channels. According to the invention at least part of the porous sheet has a covering support having pores over 10 nm and coarse particles over 1.4 ?m.
    Type: Application
    Filed: May 17, 2011
    Publication date: September 8, 2011
    Applicant: ECOCAT OY
    Inventors: Aulis Vakkilainen, Reijo Lylykangas, Ritva Heikkinen, Teuvo Manula, Matti Harkonen, Ari Lievonen
  • Porous sheet and substrate having porous sheet(s) for treating exhaust gases of combustion engines
    Publication number: 20070009400
    Abstract: A porous sheet for treating exhaust gases of combustion engines in open channels is disclosed. At least part of the porous sheet has a covering support having pores over 10 nm and coarse particles over 1.4 ?m.
    Type: Application
    Filed: April 19, 2004
    Publication date: January 11, 2007
    Inventors: Aulis Vakkilainen, Reijo Lylykangas, Ritva Heikkinen, Teuvo Maunula, Matti Harkonen, Ari Lievonen