335. Ascertainment of priority date.

335.     Ascertainment of priority date.

If in, or in connection with, an application for a patent1 (the application in suit), a declaration of priority is made2, whether by the applicant or any predecessor in title of his, specifying one or more relevant applications3 made by the applicant or any predecessor in title of his and each having a date of filing4 during the period allowed5, then:

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    (1)     the priority date6 of the invention7 to which the application in suit relates is the date of filing of the relevant application or, if there are more than one, of