(19)

(11)

EP 3 762 420 A1

(12)

(43) Date of publication: 13.01.2021 Bulletin 2021/02 (21) Application number: 19712879.6 (22) Date of filing: 08.03.2019

(51) International Patent Classification (IPC):  C07K 16/28(2006.01) A61K 47/64(2017.01) (86) International application number: PCT/US2019/021449 (87) International publication number: WO 2019/173771 (12.09.2019 Gazette 2019/37)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 09.03.2018 US 201862641190 P (71) Applicant: CytomX Therapeutics, Inc. South San Francisco, California 94080 (US)

(72) Inventors: SINGH, Shweta San Francisco, CA 94080 (US) PAIDHUNGAT, Madan San Francisco, CA 94080 (US) WONG, Sylvia San Francisco, CA 94080 (US) FLANDEZ, Jeanne, Grace San Francisco, CA 94080 (US) ELKINS, Kristi San Francisco, CA 94080 (US) SCHLEYER, Siew San Francisco, CA 94080 (US) (74) Representative: Chapman, Desmond Mark  Carpmaels & Ransford LLP One Southampton Row London WC1B 5HA London WC1B 5HA (GB)