Description of patent

The description of patent no. 393799, owned by the Państwowa Fabryka Związków Azotowych (State Factory of Nitrogen Compounds) in Chorzów. It concerns the improvement of phosphorus production processes. Patent obtained by the United Kingdom. The patent application was filed on 16 August 1932; the acceptance took place on 15 June 1933; priority for Poland dated 28 September 1931. The patent description bears an obsolete stamp of the Biblioteka Centralna Państwowej Fabryki Związków Azotowych (Central Library of the State Factory of Nitrogen Compounds) in Mościce (INV. no. 1477). The Państwowa Fabryka Związków Azotowych (State Factory of Nitrogen Compounds) in Chorzów was founded in 1916 under the name Oberschlesische Stickstoffwerke AG. The Polish government's official takeover of the plant took place in July 1922. In 1933 the Chorzów plant was merged with the Państwowa Fabryka Związków Azotowych (State Factory of Nitrogen Compounds) in Mościce and Chorzów.