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Compositions and Methods for Inhibiting Gene Expression of LPA

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Published March 25th, 2026
Detected April 1st, 2026
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Summary

The European Patent Office published patent EP4029941A1 for Arrowhead Pharmaceuticals, Inc., covering compositions and methods for inhibiting gene expression of Lipoprotein(a) (LPA). The patent lists 12 inventors and claims priority to IPC classifications C12N 15/113 and A61K 31/713. The designation covers all 31 European Patent Convention member states.

What changed

The EPO granted Arrowhead Pharmaceuticals patent EP4029941A1 for RNAi-based compositions targeting the LPA gene, which is associated with cardiovascular disease risk. The patent application includes claims covering the molecular constructs, delivery mechanisms, and therapeutic applications for reducing LPA protein expression. Designated states include all major EU economies (DE, FR, GB, IT, ES) plus Switzerland, Norway, and other EPC member states.

Patent holders and licensees should verify freedom-to-operate for any LPA-targeting therapeutics in these designated territories before commercial development. Generic pharmaceutical companies and research institutions should assess whether their LPA gene inhibition programs may infringe these claims. The patent term extends 20 years from the priority date.

Source document (simplified)

← EPO Patent Bulletin

COMPOSITIONS AND METHODS FOR INHIBITING GENE EXPRESSION OF LPA

Publication EP4029941A1 Kind: A1 Mar 25, 2026

Applicants

Arrowhead Pharmaceuticals, Inc.

Inventors

MELQUIST, Stacey, KANNER, Steven, ROZEMA, David, B., LEWIS, David, L., ALMEIDA, Lauren, J., WAKEFIELD, Darren, H, TRUBETSKOY, Vladimir, S., PEI, Tao, LI, Zhen, ALMEIDA, Aaron

IPC Classifications

C12N 15/113 20100101AFI20220614BHEP A61K 31/713 20060101ALI20220614BHEP

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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Source

Analysis generated by AI. Source diff and links are from the original.

Classification

Agency
EPO
Published
March 25th, 2026
Instrument
Notice
Legal weight
Binding
Stage
Final
Change scope
Minor
Document ID
EP4029941A1

Who this affects

Applies to
Pharmaceutical companies Drug manufacturers Investors
Industry sector
3254 Pharmaceutical Manufacturing
Activity scope
Patent Grant Intellectual Property
Geographic scope
European Union EU

Taxonomy

Primary area
Intellectual Property
Operational domain
Legal
Topics
Healthcare Pharmaceuticals

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