IPC First one in list is primary classification. Term of patent in Canada is 17 years from this date for patents filed before October 1 1989. Compensation is possible for infringement between this date and the issue date but action cannot be taken until after issue. Must be no more than 1 year earlier than filing date. This allows easier identification of the various data associated with a patent document.
Abstracts can appear on the front page or on a separate page.
They are a short summary of the invention written by the applicant which also contains a statement of the use of the invention. Abstracts cannot be used to interpret the scope of the invention from a legal standpoint. They are used to aid in searching. The description forms the main part of the patent. It must contain all the subject matter related to the invention.