Bayer AG began marketing in the United States soon after the company's inception in
Germany. In the late 19th century, they began to sell their trademark medication,
aspirin. While the name "aspirin" became synonymous with Bayer for over a quarter of a century, the company's patents and
trademarks were seized by the United States
Office of Alien Property Custodian in 1917, due to Germany's enemy status in
World War I. These assets were later auctioned and sold to
Sterling Drug.
Mobay In 1954, Bayer AG and
Monsanto reached an agreement for establishment of a joint venture that was to be called
Mobay. Initially established in
St. Louis, Mobay established its headquarters in
Pittsburgh, Pennsylvania in 1958, moving to a location in
Robinson Township in 1960. A
polyurethanes manufacturing site in
New Martinsville, West Virginia began operation in 1955. In 1964 the
United States Department of Justice brought antitrust action against Mobay, resulting in Bayer AG reaching an agreement to purchase Monsanto's share of the company in 1967. In 1994, Bayer reacquired full rights to all former Bayer products after they purchased the Winthrop division of
over-the-counter drugs from
GlaxoSmithKline, and the Miles name was discontinued. In 2012, Bayer relocated the top United States administrative head to the Bayer HealthCare site in
Whippany. In 2019, Bayer announced the end of it operations at its Pittsburgh site. Later that year Bayer agreed to sell its Pittsburgh facilities to
Covestro.
Bayer MaterialScience divestiture On September 18, 2014, the Board of Directors of Bayer AG announced plans to float the Bayer MaterialScience business on the stock market as a separate entity. This transaction was completed in the fall of 2015 with the establishment of
Covestro AG. ==Products==