1900 - Count Ferdinand von Zeppelin launched the first hydrogen-filled Zeppelin LZ1 airship.
1901 - Wilhelm Normann introduced the hydrogenation of fats.
1903 - Konstantin Eduardovich Tsiolkovskii published "The Exploration of Cosmic Space by Means of Reaction Devices"
1907 - Lane hydrogen producer
1909 - Count Ferdinand Adolf August von Zeppelin made the first long distance flight with the Zeppelin LZ5.
1909 - Linde-Frank-Caro process
1910 - The first Zeppelin passenger flight with the Zeppelin LZ7.
1910 - Fritz Haber patented the Haber process.
1912 - The first scheduled international Zeppelin passenger flights with the Zeppelin LZ13.
1919 - The first Atlantic crossing by airship with the Beardmore HMA R34.
1920 - Hydrocracking, a plant for the commercial hydrogenation of brown coal is commissioned at Leuna in Germany.
1923 - Steam reforming, the first synthetic methanol is produced by BASF in Leuna
1923 - J. B. S. Haldane envisioned in Daedalus; or, Science and the Future "great power stations where during windy weather the surplus power will be used for the electrolytic decomposition of water into oxygen and hydrogen."
1926 - Partial oxidation, Vandeveer and Parr at the University of Illinois used oxygen in the place of air for the production of syngas.
1926 - Cyril Norman Hinshelwood described the phenomenon of chain reaction.
1926 - Umberto Nobile made the first flight over the north pole with the hydrogen airship Norge
1929 - Paul Harteck and Karl Friedrich Bonhoeffer achieve the first synthesis of pure parahydrogen.
1930 - Rudolf Erren - Erren engine - GB patent GB364180 - Improvements in and relating to internal combustion engines using a mixture of hydrogen and oxygen as fuel
1935 - Eugene Wigner and H.B. Huntington predicted metallic hydrogen.
1937 - The Zeppelin LZ 129 Hindenburg was destroyed by fire.
1937 - The Heinkel HeS 1 experimental gaseous hydrogen fueled centrifugal jet engine is tested at Hirth in March- the first working jet engine
1937 - The first hydrogen-cooled turbogenerator went into service at Dayton, Ohio.
1938 - The first 240 km hydrogen pipeline Rhine-Ruhr .
1938 - Igor Sikorsky from Sikorsky Aircraft proposed liquid hydrogen as a fuel.
1939 - Rudolf Erren - Erren engine - US patent 2,183,674 - Internal combustion engine using hydrogen as fuel
1939 - Hans Gaffron discovered that algae can switch between producing oxygen and hydrogen.
1943 - Liquid hydrogen is tested as rocket fuel at Ohio State University.
1943 - Arne Zetterström describes hydrox
1949 - Hydrodesulfurization (Catalytic reforming is commercialized under the name Platforming process)
1952 - Hydrogen maser
1952 - Non-Refrigerated transport Dewar
1955 - W. Thomas Grubb modified the fuel cell design by using a sulphonated polystyrene ion-exchange membrane as the electrolyte.
1957 - Pratt & Whitney's model 304 jet engine using liquid hydrogen as fuel tested for the first time as part of the Lockheed CL-400 Suntan project.
1957 - The specifications for the U-2 a double axis liquid hydrogen semi-trailer were issued.
1958 - Leonard Niedrach devised a way of depositing platinum onto the membrane, this became known as the Grubb-Niedrach fuel cell
1958 - Allis-Chalmers demonstrated the D 12, the first 15 kW fuel cell tractor.
1959 - Francis Thomas Bacon built the Bacon Cell, the first practical 5 kW hydrogen-air fuel cell to power a welding machine.
1960 - Allis-Chalmers builds the first fuel cell forklift
1961 - RL-10 liquid hydrogen fuelled rocket engine first flight
1964 - Allis-Chalmers built a 750-watt fuel cell to power a one-man underwater research vessel.
1965 - The first commercial use of a fuel cell in Project Gemini.
1965 - Allis-Chalmers builds the first fuel cell golf carts.