• vcard
D 314.889.7057
F 314.754.8328
  • Education
    • J.D., magna cum laude, Saint Louis University, 2004, Alpha Sigma Nu Jesuit Honor Society; Order of the Woolsack; Managing Editor, Saint Louis University Public Law Review; Dean's List; Academic Excellence Award Recipient: Constitutional Law, Legal Profession and Jurisprudence
    • B.S., Truman State University, 2000
  • Court Admissions
    • U.S. District Court, Eastern District of Missouri
    • U.S. District Court, Western District of Missouri
    • U.S. Court of Appeals, Federal Circuit
    • U.S. District Court, Northern District of Illinois
    • U.S. District Court, Eastern District of Texas
    • U.S. District Court, Northern District of Texas
    • U.S. District Court, District of Kansas
John Challis protects individual and business clients, diligently working toward the best possible outcome in all of their legal matters. Focused in the areas of intellectual property and technology litigation, he serves clients by providing counseling, advice, and litigation support on:
  • Patent infringement
  • Trademark infringement
  • Copyright infringement
  • Intellectual property ownership
  • Licensing issues
  • Unfair competition
  • Trade secrets

John also has significant experience in the areas of probate, trust, and fiduciary litigation, as well as business litigation. His national practice includes representation in state and federal courts, as well as administrative bodies such as the U.S. Patent and Trademark Office. While he is fully prepared to proceed through trial, John understands the value of alternative dispute resolution and is fully versed in utilizing mediation and arbitration to obtain favorable results for clients.
  • Obtained a Writ of Mandamus from the Federal Circuit to force the transfer of a patent infringement matter out of the Eastern District of Texas to New York on behalf of a financial client. Thereafter prevailed on summary judgment of non-infringement and invalidity.
  • Successfully represented a neutraceutical patent holder in the Western District of Missouri through claim construction. After a successful claim construction, the lawsuit was resolved on confidential terms.
  • Obtained a personal jurisdiction dismissal and transfer of a trademark declaratory judgment action filed in Texas on behalf of a client as the trademark holder. The case was transferred to the client’s home jurisdiction and thereafter dismissed.
  • Successfully defended a client in a patent infringement action filed in the Eastern District of Missouri. The case settled after successfully obtaining the reexamination of the asserted patent.
  • Successfully defended a health care system against a claim relating to a physician referral agreement. After prevailing at trial, the matter was appealed and successfully affirmed.
  • Successfully defended a real estate owner against a multi-million dollar claim relating to an option to purchase. After prevailing on summary judgment, the matter was appealed and successfully affirmed.
  • Successfully obtained dismissal of patent claims on the grounds that the United States, as co-owner, was not a party. Successfully defended Writ of Mandamus that followed. Case was thereafter settled on favorable terms.
  • After obtaining a dismissal that was ultimately overturned by the Missouri Supreme Court, a breach of trust case was tried to a successful conclusion, absolving the fiduciary of all liability.
  • Successful defense of a trust contest alleging that the trustee improperly obtained a trust amendment. Prevailed for the client on summary judgment and the case was thereafter resolved on favorable terms.
  • Successfully defended a trustee against a request for accounting from a contingent remainder beneficiary. After prevailing on summary judgment, the case was affirmed by the Court of Appeals.
Publications & Presentations
No Guts No Glory: Issues Unique to Representing Fiduciaries
Bar Association of Metropolitan St. Louis
February 2012
Publications & Presentations
Undoing the Written Word: Pitfalls, Possibilities, and Procedures in Will and Trust Contests
Bar Association of Metropolitan St. Louis
February 2011
Publications & Presentations
Damages in Fiduciary Litigation: How to Calculate and Effectively Present
Bar Association of Metropolitan St. Louis
February 2010
Publications & Presentations
Mock Probate Trial
Society of Financial Service Professionals
October 2009
Publications & Presentations
Contesting Trusts and Actions Against Trustees
Missouri Bar Annual Meeting
September 2009
Publications & Presentations
Fiduciary Investment Duties: Be Prudent and Diversify
Publications & Presentations
Protecting the Protector: Representing the Trustee in Good Times and Bad
October 2007
Publications & Presentations
I’m Sorry Your Honor, You Will Not Decide My Fate Today
Saint Louis University Public Law Review