Basic definitions

A document

European patent application, published 18 months after filing with the EPO or 18 months after priority date

  • A1 document

    European patent application published with European search report
  • A2 document

    European patent application published without European search report (search report not available at the publication date)
  • A3 document

    Separate publication of the European search report
  • A4 document

    Supplementary search report

Corrected A document

  • A8 document

    Corrected title page of an A document, ie. A1 or A2 document.
  • A9 document

    Complete reprint of an A document, ie. A1, A2 or A3 document.

B document

European patent specification

  • B1 document

    European patent specification (granted patent)
  • B2 document

    New European patent specification (amended specification)
  • B3 document

    European patent specification (after limitation procedure)

Corrected B document

  • B8 document

    Corrected title page of a B document, ie. B1 or B2 document.
  • B9 document

    Complete reprint of a B document, ie. B1 or B2 document.

Publication date

Publication date of the original European patent document, ie. A1, A2, A3, B1, B2 or B3 document.

Issue date (of the correction)

Date of issue of the corrected version of a European patent document.

W1

Supplementary correction code indicating the first (1st) corrected version of a patent document

W2

Supplementary correction code indicating the second (2nd) corrected version of a patent document


For further information on corrections to European patent documents, please forward your request to:

EPO Quality Control
Rennweg 12
1031 Vienna
qcontrol@epo.org

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