Platinite is an alloy of roughly 55-45 iron and nickel. It was used to replace platinum in early light bulbs as a conductor that had the same coefficient of expansion as glass to convey power to the filaments. My father recalled that light bulbs were expensive, but the electric company would replace them free (or maybe very cheaply) if you brought the old ones back so they could recover the platinum. I wanted to find out when this happened. Just google it, you say? I could not disgorge this information from google. There are dictionary definitions, but no wiki page I could find on the subject.
1897, according to its discoverer’s obit. His own Nobel lecture is less specific.
1897 seems right. He published a paper in 1898.
Also there is an article describing platinite in 1905. 28 Jan 1905 - A NEW ALLOY. - Trove
platinite is also called red platinum.
see 30 Jun 1929 - RED PLATINUM - Trove
Now we know why sections of the conductors in light bulbs are red ! Due to the oxidisation problem described in the 1905 article, its given a longer life by coating it in copper.
WW1 perhaps created a demand for platinum , it might have been a policy during WW1 to replace platinum containing light bulbs with platinum free light bulbs.
see The Pressure of Shortage: Platinum Policy and the Wilson Administration During World War I | Business History Review | Cambridge Core