I promise I'll get off the MCM kick shortly. But for now...
Below is a sampling of the standard Chicago Mid-Century storm door. It's got a solid bottom quarter panel, and a three-part upper section, with two sidelights flanking a clear central panel. The sidelights typically sport an applied geometric pattern, or a translucent, textured, colored plastic panel. The frame is built with stainless steel, polished to a mirror shine. Sometime the main panel is a series of movable slatted windows, allowing the storm door to double as a screen door.
Much like the colored glass blocks, they appear all over Chicago, as if one builder or manufacturer had a chokehold on the entire industry. They're mostly on suburban-style ranch/bungalows, but I've even seen them on houses with medieval stylings, where they look strangely out of place.
With the right elements, though, they're a key part of the Chicago mid-century look.