Electronic Filing System (USPTO)

Electronic Filing System of the United States Patent and Trademark Office (USPTO), also referred to as EFS-Web or simply EFS, was a web-based system for submitting patent applications and related documents electronically. All users could file new applications for accelerated examination, design patents, design patent reissues, international applications for filing in the US receiving office, provisional applications, reexamination requests, utility patents under 35 U.S.C. § 111(a), utility patent reissues, U.S. National Stage applications under 35 U.S.C. § 371, ASCII text files (for sequence listings, computer listings, mega tables, mathematical formulae, chemical formulae, and 3D protein crystal structures), and petitions under 37 C.F.R. § 1.378(c).

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