Michael P. Ellenberger

Michael P. Ellenberger
O: 224.335.9979
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McNeill Baur PLLC
1433 North Water Street
Suite 400
Milwaukee, WI 53202*

Protecting your innovation with a background in research and litigation

Michael P. Ellenberger focuses his practice on patent prosecution and due diligence investigations. With his background in patent litigation and experience as a researcher with the National Institutes of Health, Michael advises clients with an intricate understanding of the legal and scientific questions that arise during the life cycle of a patent.

Michael has experience in a wide range of technical areas in the life sciences space, including medical devices and biopharmaceuticals, small molecule therapeutics for type-2 diabetes, medical neurochemistry, and more. Moreover, Michael has represented clients in high-stakes litigations. His experience includes developing pre-litigation strategy, drafting contentions, conducting fact and expert discovery, preparing dispositive motions, and more. Michael’s litigation expertise informs his current work in prosecution and counseling through a deep understanding of how challengers attack patents. Additionally, Michael has authored publications for medical chemistry and molecular pharmacology journals, as well as the Northwestern Journal of Technology & Intellectual Property. He is qualified to practice before the USPTO as a patent attorney.

Michael joins McNeill Baur PLLC after having practiced in the IP Litigation group at Kirkland & Ellis LLP in Chicago. While at the Northwestern Pritzker School of Law, Michael worked as a law clerk for Richards Patent Law P.C., Waller Lansden Dortch & Davis, and Rakoczy Molino Mazzochi Siwik LLP. Before starting his legal practice, Michael conducted medicinal chemistry research at the National Institute on Drug Abuse within the National Institutes of Health, in the lab of Dr. Amy H. Newman.

Select Publications

The Waiting is the Hardest Part: Does Longer Patent Pendency Mean More Valuable Patents?,” 16 Nw. J. Tech. & Intell. Prop. 189, 2019.

 “Dopamine D4 Receptor-Selective Compounds Reveal Structure-Activity Relationships that Engender Agonist Efficacy,” Journal of Medicinal Chemistry,62 (7):3733-374, 2019 (coauthor).

Novel Bivalent Ligands Based on the Sumanirole Pharmacophore Reveal Dopamine D2- Receptor D2-Biased Agonist,” Journal of Medicinal Chemistry, 60(7):2890-2907, 2017 (coauthor).

Synthesis and Pharmacological Characterization of Novel trans- Cyclopropylmethyl-Linked Bivalent Ligands That Exhibit Selectivity and Allosteric Pharmacology at the Dopamine D3 Receptor (D3R),” Journal of Medicinal Chemistry, 60(4):1478-1494, 2017 (coauthor). 

Toward Understanding the Structural Basis of Partial Agonism at the Dopamine D3 Receptor,” Journal of Medicinal Chemistry, 60(2):580-593, 2017 (coauthor).

Novel and High Affinity 2- [(Diphenylmethyl)sulfinyl]acetamide (Modafinil) Analogues as Atypical Dopamine Transporter Inhibitors,” Journal of Medicinal Chemistry, (23):10676-10691, 2016 (coauthor). 

Highly selective dopamine D3 (D3R) receptor antagonists and partial agonists based on eticlopride and the D3R crystal structure: new leads for opioid dependence treatment,” Journal of Medicinal Chemistry, (23):10676-10691, 2016 (coauthor). 

Evidence for Non-Canonical Neurotransmitter Activation: Norepinephrine as a Dopamine D2-like Receptor Agonist,” Molecular Pharmacology, 89(4):457-66, 2016 (coauthor).

Using click chemistry toward novel 1, 2, 3-triazole-linked dopamine D3 receptor ligands,” Bioorganic & Medicinal Chemistry, 23(14):4000-12, 2017 (coauthor).



N.D. Illinois

US Patent and Trademark Office 


*Not admitted in WI  



Northwestern Pritzker School of Law,

JD, 2019


Washington University in St. Louis,

BA, Chemistry-Biochemistry, 2014