definiens: means all present and/or future patents ( including inventor 's certificates ) and all present and/or future applications ( including provisional applications ) therefor throughout the world as the case may be, and substitutions, extensions, reissues, renewals, divisions, continuations, or continuation - in - part thereof or therefor, owned or 1 CONFIDENTIAL Exhibit 10.20 CONFIDENTIAL TREATMENT REQUESTED CONFIDENTIAL controlled ( either fully or partially ) by Arena, or under which Arena may grant licenses or sublicenses, to the extent they are directed to ( 1 ) Arena Activation Technology and/or ( 2 ) CART Activated Receptor(s ) and/or ( 3 ) Screening Assay(s ) and/or ( 4 ) CART Identified Ingredient(s ) . It is understood that ICI Patent Rights shall be excluded from the scope of Arena Patent Rights . A list of Arena Patent Rights shall be attached hereto as Appendix Bl as of the Effective Date and Arena shall update Appendix Bl from time to time during the terms of this Agreement by sending ICI such updated Appendix Bl and also the updated Appendix Bl as of the end of December in each year within one ( 1 ) month after such date