U.S. District Court for the Eastern District of Texas on Tuesday issued a permanent injunction that “prohibits Microsoft from selling or importing to the United States any Microsoft Word products that have the capability of opening .XML, .DOCX or DOCM files (XML files) containing custom XML” due to patent infringement.

Toronto-based i4i sued Microsoft in March 2007 alleging that Microsoft violated its 1998 patent for a document system that eliminated the need for manually embedded formattings codes.

In May, a federal jury in Texas, ruled that the custom XML tagging features of Word 2003 and Word 2007 infringed on i4i’s patent and ordered Microsoft to pay $200 million in the case. In Tuesday’s ruling, Microsoft was ordered to pay an additional $90 million for willful infringement and so on. The order requires Microsoft to comply with the injunction within 60 days and forbids Microsoft from testing, demonstrating, or marketing Word products containing the contested XML feature.

Microsoft said it was disappointed in the ruling and that it would appeal the verdict. “We believe the evidence clearly demonstrated that we do not infringe and that the i4i patent is invalid,” Microsoft spokesperson Kevin Kutz said, according to Cnet.

It’s unlikely that Microsoft will take one of its biggest money-makers off the market, and some people think the software giant would recraft Word in a way so that it doesn’t infringe on i4i’s technology.