535. Excepted acts; right to continue prior use.

An act which would otherwise constitute an act of infringement of a patent1 does not do so2 if:


    (1)     it is done privately and for purposes which are not commercial3;


    (2)     it is done for experimental purposes relating to the subject matter of the invention4;


    (3)     it consists of the extemporaneous preparation in a pharmacy of a medicine for an individual in accordance with a prescription given by a registered medical or dental practitioner or consists of dealing with a medicine so prepared5;


    (4)     it consists of a specified use connected with ships, aircraft, hovercraft or vehicles6;


    (5)     it