How long an Invention Patent is valid?
An invention patent shall be valid till expiration of the 20th year from the date of filing of the application with the Federal Executive Body in the Field of Intellectual Property. The term of an invention patent relating to a medicinal substance, pesticide or agrochemical substance, the use of which requires obtaining a permission through a procedure as established by law, may be extended by the Federal Executive Body in the Field of Intellectual Property at the request of the patentee for the period calculated as the term between the application filing date and the date when the first such permission for use was obtained, reduced by five years. Whereas the extension period shall not exceed five years. The mentioned request shall be filed within the term of the patent before expiration of a six-month time limit from the date of obtaining such permission or from the date of the patent grant, depending on which of these two time limits expires later.
