In 1929, Sylvia Stoesser became the first woman chemist hired at Dow Chemical Co. During her time there, she earned 22 patents and became a key figure in the development of polystyrene, including co-editing the first comprehensive book on styrene.
According to her Wikipedia entry, Stoesser found freedom to chase her interests at Dow: "In our laboratory no idea was discarded as being too crazy to investigate. In fact, we were encouraged daily to consider the impossible goal. Along with that freedom of thought and encouragement to try the impossible came many failures at the laboratory stage — but there were also many new product and process successes," Stoesser is quoted as saying in a history of the company.
Some 90 years later, Dow has now honored her by naming its newest building the Sylvia Stoesser Center.
It houses 350 employees and is connected to Dow's global headquarters in Midland, Mich.
(Although perhaps Dow could do a little more to boost her profile. A search for the word Stoesser on its website yields no hits. Although there was a nice post on Twitter about the building's opening.)
Update: Dow notes that while the search function does not provide information about Stoesser, under the website's history page is a "Women in STEM" page, which includes Stoesser.