Many people collect vintage magazine ads. I don't but I worked for 35 years for the company featured in these ads. Rohm and Haas Company was a large chemical company with a 100-year history when it was bought by Dow Chemical in 2009. Although it was a pretty big company, most people did not know if it, unless you lived in it's headquarter city of Philadelphia. The company mainly sold to other industrial companies, not directly to the consumer market. One R&H product you probably know is Plexiglas.
Plexiglas in the 1930s. The company got a big boost during the Second World War when Plexiglas was the material of choice for aircraft windows. After the war, Plexiglas found a big market in outdoor signage, as the ad above illustrates. Plexiglas would find a lot of other architectural uses such as lighting and skylights.