I believe that it is safe to say that more than one year has elapsed from the filing of your US patent application that resulted in the US patent to which you have referred. That being the case, it is no longer possible to obtain a patent in Canada or anywhere else. However, since you have no protection in Canada, you need to make sure that the agreeement with your Canadian partner provides sufficient safeguards to insure that your partner does not use information obtained from you to make his own mold and to go into business in Canada in competition with you.
Answered on Feb 11th, 2013 at 3:13 PM