Complex sentence: Joy is angry and travels to California to meet with the manufacturer, who refuses to pay her back and discovers that the manufacturer is about to fraudulently patent her design, to claim that they were the ones who originally created the mop.
Split into simpler sentences: Joy is angry and travels to California to meet with the manufacturer, who refuses to pay her back. Joy also discovers that the manufacturer is about to fraudulently patent her design, to claim that they were the ones who originally created the mop.