Section 127(4)
PA 1977
Patents Act 1977 · United Kingdom
An application for a patent which is made before the appointed day, but which does not comply with subsection (2)(b) above, shall be taken to have been abandoned immediately before that day, but, notwithstanding anything in section 5(3) above, the application may nevertheless serve to establish a priority date in relation to a later application for a patent under this Act if the date of filing the abandoned application falls within the period of fifteen months immediately preceding the filing of the later application.
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Source: legislation.gov.uk · retrieved 2026-09-04