CTHIn ForceAct
Patents Act 1990
23Validity not affected by publication etc. after priority date
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#### 23 Validity not affected by publication etc. after priority date
A patent is not invalid, so far as the invention is claimed in any claim, merely because of:
(a) the publication or use of the invention, so far as claimed in that claim, on or after the priority date of that claim; or
(b) the grant of another patent which claims the invention, so far as claimed in the first‑mentioned claim, in a claim of the same or a later priority date.