Schedule 1, paragraph 3(1)

This paragraph and paragraph 4 below shall have effect with respect to the duration of existing patents after the appointed day, and in those paragraphs— “old existing patent” means an existing patent the date of which fell eleven years or more before the appointed day and also any patent of addition where the patent for the main invention is, or was at any time, an old existing patent by virtue of the foregoing provision; “new existing patent” means any existing patent not falling within paragraph (a) above; and any reference to the date of a patent shall, in relation to a patent of addition, be construed as a reference to the date of the patent for the main invention.

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