The application for the patents was submitted in 2008, a WIPO number awarded in 2009, European Patent in October 2013 and the US Patent in July 2014.
The patent application and process was funded and facilitated by TIFAC, a division of the Department of Science and Technology, a press release said.
The patent deals with the manufacture of transparent, large band gap, high refractive index and high temperature stable non-stoichiometric titanium nitride thin films.
These films exhibit different colours such as blue, magenta, brown and golden yellow, which makes them very attractive for decorative applications including artificial jewellery and watches.
