WM UMWELTTECHNIK GMBH

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4919763 Apparatus for converting sewage sludge filter cake by pyrolysisExpiredJul 15, 87Apr 24, 90[C10B]
4203760 Method for producing steel from sponge metal by using a gas plasmaExpiredMar 09, 78May 20, 80[C21C]

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