In 1894 Linde starts with air liquefaction trials, followed by a patent for the so-called “Linde air” (a 50/50 mix of oxygen and nitrogen) in 1905. (Linde)
Milestones in Technical Gases

Setting the Pace: A Technology Pioneer Steps on the Gas

Ideas in technical gases don’t have to remain pipe dreams. When Carl von Linde invented his air separation process over a century ago, it marked the start of a success story that continues to this day. Technical gases revolutionized entire sectors, and continue to do so today. Just like Linde — the market leader in the gas industry who sets standards for these raw materials supplied in pressure cylinders …

Read on