Patents Assigned to Metsa-Serla
  • Filler for use in paper manufacture and procedure for producing a filler
    Patent number: 6375794
    Abstract: The invention relates to a filler used in paper manufacture and mainly consisting of calcium carbonate, and to a procedure for producing the filler. The filler consists of porous aggregates formed by precipitated calcium carbonate particles. In the procedure, calcium carbonate is precipitated.
    Type: Grant
    Filed: November 30, 2000
    Date of Patent: April 23, 2002
    Assignee: Metsa-Serla
    Inventors: Petri Silenius, Markku Leskela
  • Filler for use in paper manufacture and procedure for producing a filler
    Patent number: 6251222
    Abstract: The invention relates to a filled used in paper manufacture and mainly consisting of calcium carbonate, and to a procedure for producing the filler. The filler consists of porous aggregates formed by precipitated calcium carbonate particles. In the procedure, calcium carbonate is precipitated.
    Type: Grant
    Filed: March 5, 1998
    Date of Patent: June 26, 2001
    Assignee: Metsa-Serla
    Inventors: Petri Silenius, Markku Leskela