patent. Though Urban won the initial hearing, the verdict was overturned on appeal. Lord Justice Buckley wrote: The patent is I think invalid because it does not achieve the result which the patentee says it will achieve. The matter may be summarised thus: The patentee says his process will reproduce the natural colours or approximately so. Blue is a colour. He says: Drop the tri-colour blue; do not employ the blue end of the spectrum – blue or approximately blue will still be reproduced. It will not. The patent is consequently invalid. Although Kinemacolor could still be operated, it was no longer an exclusive and lost much of its commercial value. Urban made his last Kinemacolor film in 1915, and the last film to feature Kinemacolor was probably Saiyûki zokuhen, made in Japan in 1917. World War I During World War I, Urban worked for the covert organisation Wellington House and other British propaganda outfits. He produced the documentary feature Britain Prepared (1915) for Wellington House, which included Kinemacolor sequences of the British fleet at Scapa Flow. Urban was recruited to promote this film and other British propaganda productions in America, although he faced considerable resistance from US exhibitors who were resistant to any form of war propaganda. He worked with the Patriotic Film Corporation, formed by William Robinson to support distribution of what had been retitled How Britain Prepared, but he ran into trouble with the British propagandists when he tried to do a deal with William Randolph Hearst's International News Service, which the British viewed as pro-German and anti-British. Another company, Official Government Pictures, achieved better distribution by use of more sensationalist advertising, but Urban's task became much easier once America entered the war in April 1917. He edited the classic documentary The Battle of the Somme (1916), making the crucial decision to release the footage in feature-length form rather than as a series of short releases. Urban continued to edit and promote British documentary films in America to the end of the war, editing the government newsreel Official War Review. He formed a new business, the Kineto Company of America, in 1917. Later life Urban remained in the United States post-war to re-establish himself as a producer of educational films through his umbrella company, Urban Motion Picture Industries Inc. He produced the cinemagazine series Charles Urban Movie Chats (started 1919) and Kineto Review (started 1921), and made