Cornelis Grefhorst

Follow

Person

Zz Winterswijk, NL

People

Patents Grantslast 30 patents

Information Patent Grant
Method for producing a core sand and/or mold sand for foundry purposes
- Patent number 8,029,711
- Issue date Oct 4, 2011
- S & B Industrial Minerals GmbH
- Cornelis Grefhorst
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Method for the production of a core sand and/or molding sand for ca...
- Patent number 7,281,570
- Issue date Oct 16, 2007
- S & B Industrial Minerals GmbH
- Karl Koch
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Method for producing a molding sand that is in particular recircula...
- Patent number 7,188,660
- Issue date Mar 13, 2007
- IKO Minerals GmbH
- Cornelis Grefhorst
- B22 - CASTING POWDER METALLURGY

Patents Applicationslast 30 patents

Information Patent Application
Method for producing a core sand and/or mold sand for foundry purposes
- Publication number 20090025606
- Publication date Jan 29, 2009
- Cornelis Grefhorst
- B22 - CASTING POWDER METALLURGY
Information Patent Application
Method for the production of a core sand and/or molding sand for ca...
- Publication number 20060151145
- Publication date Jul 13, 2006
- Karl Koch
- B22 - CASTING POWDER METALLURGY
Information Patent Application
Method for producing a moulding sand that is in particular recircul...
- Publication number 20050121168
- Publication date Jun 9, 2005
- Cornelis Grefhorst
- B22 - CASTING POWDER METALLURGY