Section 28A(4)

If after it was no longer possible for the patent to be so renewed, and before publication of notice of the application for restoration, a person— he has the right to continue to do the act or, as the case may be, to do the act, notwithstanding the restoration of the patent; but this right does not extend to granting a licence to another person to do the act. began in good faith to do an act which would have constituted an infringement of the patent if it had not expired, or made in good faith effective and serious preparations to do such an act,

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Source: legislation.gov.uk · retrieved 2026-09-04