Did Kodak ever produce or market a black and white film specifically for slides?

Way back in about 1968 when I was around 15 years old on a family vacation in the Smokey Mountains, I seem to recall seeing Kodak film boxs that stated "For Back & White Slides." That was 44 years ago and I was young, but I have often wondered since then if I really saw film for black & white slides, or if I just imagine that I saw it. At the time everyone in the family used only Kodachrome but black & white did interest me.

If Kodak did make such a film, what was it?

Thanks,

Dave