(2) Any filing that is equivalent to a regular national filing under the domestic legislation of any country
of the Union or under bilateral or multilateral treaties concluded between countries of the Union shall
be recognised as giving rise to the right of priority.
(3) By a regular national filing is meant any filing that is adequate to establish the date on which the
application was filed in the country concerned, whatever may be the subsequent fate of the application.
B.—Consequently, any subsequent filing in any of the other countries of the Union before the expiration
of the periods referred to above shall not be invalidated by reason of any acts accomplished in the
interval, in particular, another filing, the publication or exploitation of the invention, the putting on sale
of copies of the design, or the use of the mark, and such acts cannot give rise to any third‐party right or
any right of personal possession. Rights acquired by third parties before the date of the first application
that serves as the basis for the right of priority are reserved in accordance with the domestic legislation
of each country of the Union.
C.—(1) The periods of priority referred to above shall be twelve months for patents and utility models,
and six months for industrial designs and trademarks.
(2) These periods shall start from the date of filing of the first application; the day of filing shall not be
included in the period.
(3) If the last day of the period is an official holiday, or a day when the office is not open for the filing of
applications in the country where protection is claimed, the period shall be extended until the first
following working day.
(4) A subsequent application concerning the same subject as a previous first application within the
meaning of paragraph (2), above, filed in the same country of the Union, shall be considered as the first
application, of which the filing date shall be the starting point of the period of priority, if, at the time of
filing the subsequent application, the said previous application has been withdrawn, abandoned, or
refused, without having been laid open to public inspection and without leaving any rights outstanding,
and if it has not yet served as a basis for claiming a right of priority. The previous application may not
thereafter serve as a basis for claiming a right of priority.