PSI - Group
Patents

 
Patents pursued with Wits Enterprise (Dr J Caveney)

A Method of producing carbon with electrically active sites
Inventors : KIENLE PAUL (DE); SELLSCHOP JACQUES PIERRE FRIED (ZA)
A method of producing carbon with electrically active sites includes the steps of providing a source of carbon and exposing that source to irradiation of an energy suitable to cause the photonuclear transmutation of some of the carbon atoms into boron
http://l2.espacenet.com/espacenet/viewer?PN=WO9948107&CY=ep&LG=en&DB=EPD
Status
SA patent 2000/4799 granted;
US patent 6,563,123 granted;
Japan application 99939856.3 pending;
European application granted; validation in selected countries to be completed by mid-March, 2004.

A METHOD OF ALTERING THE COLOUR OF A MATERIAL
Inventors : SELLSCHOP JACQUES PIERRE FRIED (ZA
A method of altering the colour of a carbon material such as diamond includes the steps of exposing the material to irradiation of an energy suitable to cause the photonuclear transmutation of selected atoms into other atoms capable of producing a colour change in the material, the irradiation being such as to cause transmutation of sufficient of the selected atoms into the other atoms to produce a colour change in the material. The method can be used to import a blue colour to diamond or bleach or reduce the colour of a yellow diamond. The irradiation will generally be achieved using photons.
http://l2.espacenet.com/espacenet/viewer?PN=WO9967171&CY=ep&LG=en&DB=EPD
Status
SA patent 2001/0442 granted;
European patent 9995719.9 contended, physics debate in progres


Detection of Diamonds
Inventors : JPF Sellschop, SH Connell
Filed as a SA Provisional 2004/2010


Athermal Resonant Annealing of Selected Defects in Diamond
Inventors JPF Sellschop, SH Connell
Filed as a SA Provisional 2004/2449


A Method of Elephant Conservation by 14-C dating
Inventor : E Sideras-Haddad
Filed as a SA Provisional