Patents by Inventor Michael Hammeken

Michael Hammeken 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).

  • Spiral-wound filtration cartridge with longitudinal bypass feature
    Patent number: 5490926
    Abstract: A spiral-wound filtration cartridge, which renders the need for brine seals unnecessary, is disclosed. The spiral cartridges of the invention comprise a spirally-wound inner filtration assembly having an impermeable outer cylindrical surface, a housing having a cylindrical cavity formed therein for receiving the inner filtration assembly, and at least one continuous longitudinally-oriented fluid pathway disposed between the inner filtration assembly and the housing, the fluid pathway allowing for a portion of a fluid entering one end of the filtration cartridge to bypass the inner filtration assembly and proceed to the other end of the filtration cartridge.
    Type: Grant
    Filed: October 31, 1994
    Date of Patent: February 13, 1996
    Assignee: W.R. Grace & Co.-Conn.
    Inventor: Michael Hammeken