Federal Act
on Patents for Inventions
(Patents Act, PatA)1

of 25 June 1954 (Status as of 1 July 2023)

1Amended by No I of the FA of 3 Feb. 1995, in force since 1 Sept. 1995 (AS 1995 2879; BBl 1993 III 706).


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Art. 28a72

The ef­fects of the gran­ted pat­ent shall be deemed not to have oc­curred from the out­set in­so­far as the pro­pri­et­or of the pat­ent sur­renders the pat­ent or the court de­clares the nullity of the pat­ent based on a nullity ac­tion.

72 In­ser­ted by Art. 2 of the FD of 16 Dec. 2005 on the ap­prov­al of the Act to Re­vise the European Pat­ent Con­ven­tion and on the Amend­ment of the Pat­ents Act, in force since 13 Dec. 2007 (AS 2007 6479; BBl 2005 3773).

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