428. Compensation for Crown use.

428.     Compensation for Crown use.

Any use by a government department of a patented invention1 made after the publication of the application for the patent for the invention2, or in consequence of a relevant communication3 made after the priority date4 of the invention otherwise than in confidence5, must be made on such terms as may be agreed, either before or after the use, by the government department and the proprietor of the patent, with Treasury approval, or, in default of such agreement, on such terms as may be determined6 by the court7.

Any such use of an invention