After World War I, Merck & Co was setup as an independent company in the United States, sharing the Merck trademark with Merck KGaA in different geographical areas. The change was part of Germany's reparations under the Treaty of Versailles.
Merck KGaA asked the court to force Facebook to explain why it lost administrative control over www.facebook.com/merck, and why the American Merck & Co was now using it. The German Merck said that Facebook had not been helpful, and even evasive, when approached for an explanation.
"The transfer of the vanity URL Facebook.com/Merck from Merck KGaA to Merck & Co was due to an administrative error," Facebook said in a statement. "We apologize for any inconvenience this may have caused."
Facebook said it will make the URL unavailable until both drug companies could come to arrangement over its use.