(765 ILCS 1045/5(a)) (from Ch. 140, par. 105(a))
    Sec. 5(a). Sale of used articles or supplies, removal or destruction of mark.
    If the registrant or its assignee sells or otherwise disposes of used articles or supplies which bear a registered mark, the registrant or its assignee shall, before such sale or other disposition, remove or destroy the registered mark on such used articles or supplies; and such used articles or supplies shall not, after such sale or other disposition, thereafter be subject to the terms of this Act.
(Source: Laws 1967, p. 1405.)