 English inventor Daniel Spill had worked with Parkes and formed the Xylonite Co. to take over Parkes' patents, describing the new plastic products as "Xylonite".He took exception to the Hyatts' claims and pursued the brothers in a number of court cases between 1877 and 1884.Initially the judge found in Spill's favour, but ultimately it was judged that neither party held an exclusive claim and the true inventor of celluloid/xylonite was Alexander Parkes, due to his mention of camphor in his earlier experiments and patents.