as of 6/18/2026 2:33:23 AM

William Francis Prendergast

Brinks Gilson & Lione
NBC Tower 455 N Cityfront Plaza Dr, Suite3600
Chicago, Illinois 60611-5503

(312) 321-4200

Not available

Date Admitted

November 08, 1990

Illinois Registration Status

Not authorized to practice law due to discipline and has not demonstrated required MCLE compliance – Last Registered Year: 2008

Malpractice Insurance

No malpractice report as attorney is disciplined

Public Record of Discipline and Pending Proceedings
Case(s) below are identified by caption and Commission case number. If there is more than one case, the cases are listed from most recent to oldest. A case may have more than one disposition or more than one component to a disposition, in which case each disposition and component is also listed separately within that case record, again in an order from most recent to oldest.

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In re Prendergast, William Francis, 09DC1005
Disposition Disbarment On Consent
Effective Date of Disposition 09/22/2009
End Date of Disposition No disposition end date scheduled at this time. Discipline continues until further order of the Court.
Definition of Disposition Disbarment on consent is imposed by the Supreme Court based upon the lawyer's filing of a motion to strike his or her name from the roll of attorneys in face of disciplinary charges that are set forth in the Administrator's Statement of Charges. The disbarred lawyer is not authorized to practice law during the period of the disbarment on consent and may not return to the practice of law unless and until the lawyer has demonstrated his or her rehabilitation, good character, and current knowledge of the law in a subsequent reinstatement case, which may not be filed until three years after the effective date of the disbarment on consent.
Case Summary Mr. Prendergast, who was licensed in 1990, was disbarred on consent. He failed to prosecute at least twenty-four different patent applications for clients, then fabricated documents and made false statements to conceal his inaction from those clients, other attorneys, and the federal patent office.
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