A method for measuring the quantity of a polymeric or pre-polymeric composition within a given volume that includes combining the polymeric or pre-polymeric composition with a plurality of microparticles having a non-ferromagnetic or non-ferrimagnetic core provided with a coating that is ferromagnetic,...http://www.google.es/patents/US6037180?utm_source=gb-gplus-sharePatente US6037180 - Method for measuring the quantity of a polymeric or pre-polymeric composition
Method for measuring the quantity of a polymeric or pre-polymeric composition
