Schedule 5, paragraph 20(3)
CDPA 1988
Copyright, Designs and Patents Act 1988 · United Kingdom
No amendment of the specification of a patent shall be allowed under section 27(1), 73 or 75 if it— results in the specification disclosing additional matter, or extends the protection conferred by the patent.
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Source: legislation.gov.uk · retrieved 2026-09-04