USPTO Certification Fee: If the international application is based on one basic application or one basic registration, the fee is $100 per class based on the total number of classes in the international application. Each class only counts once, even if that class is claimed multiple times for different Contracting Party countries within the international application. The fee is $150 per class, rather than $100 per class, when the international application is based on more than one U.S. basic application or registration. These fees are for filing the international application electronically. If the international application is filed on paper, the fees will be higher.
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