Files to be Submitted - Naming Conventions

Files to be submitted are those relevant to the application in Portable Document Format (PDF), DOCX, ASCII text file format (.TXT) and if using PCT-SAFE, .ZIP compressed file format.

File naming conventions:

EXAMPLE: Filename.pdf , Filename.docx , Filename.txt or

  1. Start file name with [ A thru Z , a thru z , or 0 thru 9 ] - do not use brackets or commas; cannot start a file name with an underscore or hyphen
  2. Last 4 characters of the file name must be lowercase .pdf ,

EXAMPLE: .pdf , .txt, docx, zip

  1. Can consist of any combination* of characters selected from uppercase alphabet, lowercase alphabet and/or digits zero through nine:

[ A thru Z , a thru z , or 0 thru 9 , _ , - ] - do not use brackets, commas or symbols; can use underscore or hyphen within file name

*any combination except the following reserved device names: CON, PRN, AUX, NUI, COM1, COM2, COM3, COM4, COM6, COM7, COM8, COM9, LPT1, LPT2, LPT3, LPT4, LPT5, LPT6, LPT7, LPT8, LPT9, or CLOCK$. You should also avoid starting a file name with any of these prohibited device names.

  1. No spaces are permitted in the actual file name in EFS-Web, however, Patent Center spaces are allowed.
  2. Spaces are permitted in your local file path
  3. Length of file name is limited to a maximum of 100 characters including the required 4 character .pdf, .docx, .txt or .zip file extension





Over100charactersplusx.pdf (exceeds total 100 character limit)

Name.PDF (ends in .PDF - must be .pdf)

Any space.txt (cannot have a space in the file name except in Patent Center)

~@#$%^&*()+=]}[{"':;?/>.<,.zip (contains invalid characters within file name)

>> also see: List of valid characters for patent application titles