Inventor
VIRTANEN PENTTI
FI21 patents
⚠️ This page may combine multiple inventors who share the name “VIRTANEN PENTTI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
FP PIGMENTS OY
6 patentsUS6143064ANov 7, 2000
Pigment particles coated with precipitated calcium carbonate and a process for the preparation thereof
FP PIGMENTS OY86 citations95
US6761869B1Jul 13, 2004
Process for preparing precipitated calcium carbonate
FP PIGMENTS OY43 citations92
US6699318B1Mar 2, 2004
Process for preparing and modifying synthetic calcium carbonate
FP PIGMENTS OY26 citations92
US6602484B1Aug 5, 2003
Precipitated calcium carbonate and method for the production thereof
FP PIGMENTS OY21 citations92
US6475459B1Nov 5, 2002
Process for preparing calcium carbonate particles
FP PIGMENTS OY31 citations92
US6416727B1Jul 9, 2002
Apparatus and process for the preparation of precipitated calcium carbonate
FP PIGMENTS OY24 citations92
VIRTANEN PENTTI
5 patentsUS8192542B2Jun 5, 2012
Aqueous suspension based on hydraulic binder and a process for the production thereof
VIRTANEN PENTTI28 citations91
US8480018B2Jul 9, 2013
Method and apparatus for the preparation of finely divided calcium hydroxide
VIRTANEN PENTTI2 citations61
US8474738B2Jul 2, 2013
Impact mill
VIRTANEN PENTTI4 citations61
US4540358ASep 10, 1985
Apparatus for the manufacture of a precast building element of concrete
VIRTANEN PENTTI2 citations61
US8758566B2Jun 24, 2014
Process for manufacturing paper or board
VIRTANEN PENTTI2 citations60
KAUTAR OY
3 patentsUS4999959AMar 19, 1991
Prestressed construction element of composite structure and method for element fabrication
KAUTAR OY22 citations91
US4968349ANov 6, 1990
Method for producing hardened cement mineral material, especially concrete, and an apparatus for implementation of the method
KAUTAR OY23 citations91
US7575630B2Aug 18, 2009
Binder admixture, kaolin product and their manufacture
KAUTAR OY5 citations61