Inventor · disambiguated record
Pentti Virtanen
Also filed as: VIRTANEN PENTTI · VIRTANEN PENTTI E E
22 granted patents·6 pending applications·384 citations·filing 1974–2011
96Inventor score
Top patents by PatentIndex Score
28 records- 0195US8192542B2Aqueous suspension based on hydraulic binder and a process for the production thereofVIRTANEN PENTTI·Filed 2006·Granted Jun 5, 2012·28 cites·24 claims
- 0293US6143064APigment particles coated with precipitated calcium carbonate and a process for the preparation thereofFP PIGMENTS OY·Filed 1997·Granted Nov 7, 2000·86 cites·10 claims
- 0386US3965799AHydraulically operated percussion deviceROXON OY·Filed 1974·Granted Jun 29, 1976·46 cites·2 claims
- 0483US6761869B1Process for preparing precipitated calcium carbonateFP PIGMENTS OY·Filed 1998·Granted Jul 13, 2004·43 cites·29 claims
- 0576US6475459B1Process for preparing calcium carbonate particlesFP PIGMENTS OY·Filed 1999·Granted Nov 5, 2002·31 cites·14 claims
- 0674US6699318B1Process for preparing and modifying synthetic calcium carbonateFP PIGMENTS OY·Filed 1999·Granted Mar 2, 2004·26 cites·14 claims
- 0771US4968349AMethod for producing hardened cement mineral material, especially concrete, and an apparatus for implementation of the methodKAUTAR OY·Filed 1987·Granted Nov 6, 1990·23 cites·24 claims
- 0870US6602484B1Precipitated calcium carbonate and method for the production thereofFP PIGMENTS OY·Filed 1997·Granted Aug 5, 2003·21 cites·13 claims
- 0969US4999959APrestressed construction element of composite structure and method for element fabricationKAUTAR OY·Filed 1988·Granted Mar 19, 1991·22 cites·4 claims
- 1068US8758566B2Process for manufacturing paper or boardVIRTANEN PENTTI·Filed 2011·Granted Jun 24, 2014·2 cites·22 claims
- 1168US8354003B2Reinforced porous fibre productNORDKALK OY AB·Filed 2009·Granted Jan 15, 2013·1 cites·17 claims
- 1267US8474738B2Impact millVIRTANEN PENTTI·Filed 2006·Granted Jul 2, 2013·4 cites·4 claims
- 1365US6416727B1Apparatus and process for the preparation of precipitated calcium carbonateFP PIGMENTS OY·Filed 1998·Granted Jul 9, 2002·24 cites·10 claims
- 1463US7575630B2Binder admixture, kaolin product and their manufactureKAUTAR OY·Filed 2002·Granted Aug 18, 2009·5 cites·18 claims
- 1561US8480018B2Method and apparatus for the preparation of finely divided calcium hydroxideVIRTANEN PENTTI·Filed 2009·Granted Jul 9, 2013·2 cites·7 claims
- 1661US6787196B2Apparatus for making a web of paper or board containing calcium carbonateMETSO PAPER OY·Filed 2003·Granted Sep 7, 2004·2 cites·5 claims
- 1757US7198841B2Paper having a cellulosic fiber layer treated with elementary particlesMETSO PAPER OY·Filed 2003·Granted Apr 3, 2007·1 cites·3 claims
- 1856US2009158962A1Binder admixture, kaolin product and their manufactureKAUTAR OY·Filed 2008·Application pending·0 cites
- 1955US6680086B1Method for making paper, assembly for implementing the method and paper product produced by the methodMESTO PAPER OY·Filed 1999·Granted Jan 20, 2004·10 cites·12 claims
- 2054US2011233124A1Acidic water and its use for drainage or separation of solidsVIRTANEN PENTTI·Filed 2009·Application pending·0 cites
- 2151US2004079503A1Use of recycled calcium carbonate in the treatment of a paper, board or nonwoven productVALMET CORP·Filed 2003·Application pending·0 cites
- 2251US2004074620A1Method for treating a paper or board web with a treatment materialVALMET CORP·Filed 2003·Application pending·0 cites
- 2347US2009081112A1Process and apparatus for producing suspensions of solid matterNORDKALK OYJ ABP·Filed 2006·Application pending·0 cites
- 2441US2013199745A1Process for manufacturing paper and boardVIRTANEN PENTTI·Filed 2011·Application pending·0 cites
- 2538US8906201B2Use of acidic water in the manufacture of paperSAASTAMOINEN SAKARI·Filed 2011·Granted Dec 9, 2014·0 cites·15 claims
- 2635US4126655AMethod and apparatus for manufacturing concrete elementsVIRTANEN PENTTI E E·Filed 1976·Granted Nov 21, 1978·5 cites·3 claims
- 2731US4540358AApparatus for the manufacture of a precast building element of concreteVIRTANEN PENTTI·Filed 1983·Granted Sep 10, 1985·2 cites·6 claims
- 2830US6981308B2Support members inside stator slots of a rotating electric machine and method of mounting these support membersALSTOM TECHNOLOGY LTD·Filed 2003·Granted Jan 3, 2006·0 cites·3 claims
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