Any publication in a journal or scientific journal or on a website, including abstracts disseminated for a science symposium (e.g., the CRCHUM’s Scientific Day), previews of articles or doctoral dissertations are examples of public disclosure.
Disclosing information to colleagues in the university setting may or may not be considered confidential, depending on the agreement between the parties. Disclosure will be considered confidential when, at the time of the disclosure, the party receiving the information understands that they are required not to reveal anything to anyone and agrees to do so (e.g.: grant proposal, confidentiality agreement).
With respect to thesis defences, it is common practice to sign a confidential disclosure agreement when defending a thesis. A student’s thesis may also be kept confidential long enough to allow them to file a patent application.
When in doubt, talk to the Technology Transfer Office beforehand to find out what steps to take.