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USPTO Systems Status and Availability

Saturday Apr 19, 2014

E-Patent Reference, ESTTA, and System Maintenance

E-Patent Reference Maintenance

USPTO will perform maintenance affecting E-Patent Reference (EPR) beginning at 12:01 a.m. and ending at 5 a.m., Saturday, April 19.

EPR data viewed through Private Patent Application Information Retrieval (Private PAIR) will be unavailable during the maintenance period.

ESTTA Maintenance

USPTO will perform maintenance affecting the Electronic System for Trademark Trials and Appeals (ESTTA) beginning at 12:01 a.m. and ending at 6 a.m., Saturday, April 19.

ESTTA will be unavailable during the maintenance period.

System Maintenance

USPTO will perform system maintenance beginning at 12:01 a.m. and ending at 5 a.m., Monday, April 21.

The following systems will be unavailable during the maintenance period.

  • Assignments on the Web - Patents (AOTW-P)
  • Electronic Freedom of Information Act (E-FOIA)
  • Electronic Patent Assignment System (ePAS)
  • Electronic System for Trademark Trials and Appeals (ESTTA)
  • Electronic Trademark Assignment System (eTAS)

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