Is patent CA 2561773 A1 still valid or pending? Event shows: dead in 2008 Please inform of risk of patent infringement.
Citing the canadian patent office website as reached through the google patents link on "dead" applications:
The date that an abandoned application could normally no longer be reinstated.
Dead Application 2009-09-21
Unless the owner is in a coma and can therefore reinstate the right after waking up (I don't know if this is possible in Canada), the patent application is most probably "dead".