Inventor · disambiguated record
Pirkko Virta
Also filed as: VIRTA PIRKKO · VIRTA PIRKKO J
4 granted patents·82 citations·filing 1986–1994
78Inventor score
Files withKEMIRA OY4
Top patents by PatentIndex Score
4 records- 0169US5071634AProcess for the preparation of hydrogen peroxide (i)KEMIRA OY·Filed 1990·Granted Dec 10, 1991·31 cites·5 claims
- 0269US4756801APaper-making method and a combination of ingredients to be used in itKEMIRA OY·Filed 1986·Granted Jul 12, 1988·30 cites·1 claims
- 0348US5580533ACatalyst and process for purifying diesel exhaust gasesKEMIRA OY·Filed 1993·Granted Dec 3, 1996·14 cites·7 claims
- 0435US5534476AUse of a super alloy as a substrate for catalystsKEMIRA OY·Filed 1994·Granted Jul 9, 1996·7 cites·6 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →