Some filter names still contain "OpenOffice.org" in their names. Examples are
HTML Document (OpenOffice.org Writer)
HTML Document (OpenOffice.org Calc)
Rich Text Format (OpenOffice.org Calc)
Web Page Query (OpenOffice.org Calc)
Text Encoded (OpenOffice.org Writer/Web)
Text Encoded (OpenOffice.org Master Document)
You can see them at File -> Open, then in the file open dialog, expand the filters drop-down box.
Andras Timar committed a patch related to this issue.
It has been pushed to "master":
fdo#45159 fix filter names, remove bogus %productname% where it was necessary