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Transdermal Delivery Systems with Pharmacokinetics Bioequivalent to Oral Delivery

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

The European Patent Office published patent application EP3490559A1 for Corium, LLC covering transdermal drug delivery systems designed to achieve pharmacokinetics bioequivalent to oral delivery. The invention targets A61P 25/28 (nervous system disorders) and uses A61K 31/445, 31/13, 31/137, and 9/70 formulations. The patent is designated for all 31 EPO member states.

What changed

Corium, LLC received publication of European Patent Application EP3490559A1 for transdermal delivery systems engineered to match the pharmacokinetic profile of oral administration. The application claims formulations containing A61K 31/445, 31/13, and 31/137 compounds in A61K 9/70 transdermal matrix systems, targeting A61P 25/28 neurological applications. Inventors include Parminder Singh, Eun Soo Lee, and Amit K. Jain.

Pharmaceutical companies and drug manufacturers should note this patent publication for freedom-to-operate considerations when developing transdermal delivery formulations for neurological therapies. No compliance action is required; this is an informational publication of intellectual property rights. Patent protection extends to designated EPO states including DE, FR, GB, IT, ES, and 26 other member jurisdictions.

Source document (simplified)

← EPO Patent Bulletin

TRANSDERMAL DELIVERY SYSTEMS WITH PHARMACOKINETICS BIOEQUIVALENT TO ORAL DELIVERY

Publication EP3490559A1 Kind: A1 Mar 25, 2026

Applicants

Corium, LLC

Inventors

SINGH, Parminder, LEE, Eun Soo, JAIN, Amit K.

IPC Classifications

A61K 31/445 20060101AFI20180202BHEP A61K 31/13 20060101ALI20180202BHEP A61K 31/137 20060101ALI20180202BHEP A61K 9/70 20060101ALI20180202BHEP A61P 25/28 20060101ALI20180202BHEP

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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Named provisions

Transdermal Delivery Systems Pharmacokinetics Bioequivalent to Oral Delivery

Classification

Agency
EPO
Published
March 25th, 2026
Instrument
Notice
Legal weight
Non-binding
Stage
Final
Change scope
Minor
Document ID
EP3490559A1

Who this affects

Applies to
Pharmaceutical companies Drug manufacturers
Industry sector
3254 Pharmaceutical Manufacturing
Activity scope
Patent Filing Drug Delivery Technology
Geographic scope
European Union EU

Taxonomy

Primary area
Intellectual Property
Operational domain
Legal
Topics
Healthcare Pharmaceuticals

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