Ralf Hemel has been granted 6 US patents while listed as an inventor at Basf Se . The first was granted in 1990 and the most recent in July 2013. Ralf Hemel ranks #779,687 of 4,157,543 US inventors in our database (top 18.8%). Patent records list Ralf Hemel in Lampertheim, DE.
Patents per Year Patents granted per year, 1990 to 2013 Bar chart with a peak of 2 patents in 2013. peak 2 1990: 1 patents 1990 1991: 1 patents 1991 2007: 1 patents 2007 2012: 1 patents 2012 2013: 2 patents 2013
Issued Patents All Time
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Showing 1–6 of 6 patents
Patent # Title Co-Inventors Date
8486227 Method for producing paper, paperboard and cardboard Anton Esser , Rainer Blum , Joachim Kuhn , Marc Leduc 2013-07-16
8343312 Polymer-pigment hybrids for use in papermaking Norbert Mahr , Dieter Meck , Rainer Blum , Norbert Gispert , Juergen Schmidt-Thuemmes +1 more 2013-01-01
8337665 Method for producing paper, paperboard and cardboard Anton Esser , Rainer Blum , Joachim Kuhn , Marc Leduc 2012-12-25
7306701 Production of paper, board and cardboard Rainer Blum , Norbert Mahr , Rudolf Lorz 2007-12-11
5046853 Measuring the degree of dispersion in flowing suspensions Friedrich Linhart 1991-09-10
4952280 Process for controlling the addition of retention aids in papermaking Jaroslav Melzer 1990-08-28
