Amortization Entries. Kleen Company acquired patent rights on January 10 of Year 1 for $368,000. The patent has a useful life equal to its legal tife of eight years. On January 7 of Year 4 , Kleen successfully defended the patent in a lawsult at a cost of $18,500. If required, round your answers to the nearest dollar. a. Determine the patent amortization expense for Year 4 ended December 31 . b. Journalize the adjusting entry on December 31 of Year 4 to recognize the amortization. If an amount box does not require an entry, leave it blank.