Patents by Inventor Robert John Pristas

Robert John Pristas 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).

  • Housing for reverse osmosis filter cartridge and method of forming same
    Patent number: 8486264
    Abstract: Housings for reverse osmosis filter cartridges and methods of making the same. The housings include: (1) a hollow cylindrical liner formed of a thermoplastic polymer that is adapted to surround a reverse osmosis filter cartridge; (2) a hollow head assembly that includes a transition collar portion formed of a thermoplastic polymer that is joined to said liner and a barrel portion formed of a chopped glass fiber-filled polymer that is overmolded onto said transition collar portion; (3) an end plug that is adapted to be received within an opening in the barrel portion; and (4) an overwrap layer comprising wound glass filaments and a polymeric resin that covers the outer surfaces of the liner and head assembly.
    Type: Grant
    Filed: January 16, 2013
    Date of Patent: July 16, 2013
    Assignee: Enpress, LLC
    Inventors: Douglas S. Stolarik, Douglas M. Horner, Michael P. Mormino, Robert John Pristas
  • Housing for reverse osmosis filter cartridge and method of forming same
    Patent number: 8377298
    Abstract: Housings for reverse osmosis filter cartridges and methods of making the same. The housings include: (1) a hollow cylindrical liner formed of a thermoplastic polymer that is adapted to surround a reverse osmosis filter cartridge; (2) a hollow head assembly that includes a transition collar portion formed of a thermoplastic polymer that is joined to said liner and a barrel portion formed of a chopped glass fiber-filled polymer that is overmolded onto said transition collar portion; (3) an end plug that is adapted to be received within an opening in the barrel portion; and (4) an overwrap layer comprising wound glass filaments and a polymeric resin that covers the outer surfaces of the liner and head assembly.
    Type: Grant
    Filed: February 10, 2010
    Date of Patent: February 19, 2013
    Assignee: Enpress, LLC
    Inventors: Douglas S. Stolarik, Douglas M. Horner, Michael P. Mormino, Robert John Pristas
  • HOUSING FOR REVERSE OSMOSIS FILTER CARTRIDGE AND METHOD OF FORMING SAME
    Publication number: 20110192781
    Abstract: Housings for reverse osmosis filter cartridges and methods of making the same. The housings include: (1) a hollow cylindrical liner formed of a thermoplastic polymer that is adapted to surround a reverse osmosis filter cartridge; (2) a hollow head assembly that includes a transition collar portion formed of a thermoplastic polymer that is joined to said liner and a barrel portion formed of a chopped glass fiber-filled polymer that is overmolded onto said transition collar portion; (3) an end plug that is adapted to be received within an opening in the barrel portion; and (4) an overwrap layer comprising wound glass filaments and a polymeric resin that covers the outer surfaces of the liner and head assembly.
    Type: Application
    Filed: February 10, 2010
    Publication date: August 11, 2011
    Applicant: ENPRESS, LLC
    Inventors: Douglas S. Stolarik, Douglas M. Horner, Michael P. Mormino, Robert John Pristas