Dragonfly Therapeutics NKG2D CD16 Tumor Antigens Patent
Summary
The European Patent Office has published patent application EP3833385A1 filed by Dragonfly Therapeutics, Inc. on April 15, 2026, covering tri-specific proteins binding NKG2D, CD16, and a tumor-associated antigen. The application names eleven inventors including CHANG, Gregory, P., CHEUNG, Ann, F., and others, and classifies under IPC codes A61K 39/00 and C07K 16/28. Designated states include all EPO member states including Germany, France, the United Kingdom, Italy, Spain, and 27 other European jurisdictions.
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GovPing monitors EPO Patent Bulletin - Peptides (C07K) for new healthcare & life sciences regulatory changes. Every update since tracking began is archived, classified, and available as free RSS or email alerts — 46 changes logged to date.
What changed
The EPO published Dragonfly Therapeutics' patent application EP3833385A1 for tri-specific proteins designed to simultaneously bind NKG2D, CD16, and a tumor-associated antigen. The publication makes the invention publicly available and establishes priority dates for the immunotherapy technology. IPC classifications indicate applications in medicinal preparations containing antigens or antibodies (A61K 39/00) and immunoglobulins (C07K 16/28).
Competitors developing bispecific or tri-specific cancer immunotherapy candidates should monitor the EPO examination progress for this application, as a granted patent could affect freedom-to-operate in designated EPO member states. The publication itself does not create enforceable rights but puts the technology in the public domain for prior art purposes.
Archived snapshot
Apr 24, 2026GovPing captured this document from the original source. If the source has since changed or been removed, this is the text as it existed at that time.
PROTEINS BINDING NKG2D, CD16 AND A TUMOR-ASSOCIATED ANTIGEN
Publication EP3833385A1 Kind: A1 Apr 15, 2026
Applicants
Dragonfly Therapeutics, Inc.
Inventors
CHANG, Gregory, P., CHEUNG, Ann, F., DU, Jinyan, GRINBERG, Asya, HANEY, William, LUNDE, Bradley, M., PRINZ, Bianka, FALLON, Daniel, O'NEIL, Steven, WEI, Ronnie
IPC Classifications
A61K 39/00 20060101AFI20211115BHEP C07K 16/28 20060101ALI20211115BHEP
Designated 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
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