765 ILCS 1036/90
This Act shall not affect any application, suit, proceeding, or appeal then pending on its effective date. Except in the case of an application, suit, proceeding, or appeal pending on its effective date, this Act shall control in any conflict between the provisions of this Act and the provisions of any other Act relating to marks or any other Act that conflicts with this Act. Any application, suit, proceeding, or appeal pending at the time this Act takes effect shall continue under the law under which that application, suit, or appeal was initiated until final determination.
The intent of this Act is to provide a system of State trademark registration and protection substantially consistent with the federal system of trademark registration and protection under the Trademark Act of 1946, as amended. To that end, the construction given the federal Act shall be examined as persuasive authority for interpreting and construing this Act.
765 ILCS 1036/90