Why don't they call it Roundtine???

I just saw the "Ovaltine" episode of Seinfeld here in Tulsa.  "Ovaltine, Jerry, that's rich!"  Classic.

But when you think of it, why is it called Ovaltine? 

It occurs to me that for the last ten months, I have lived in an apartment complex called "Lincoln at Ovaltine Court."  This property used to be an Ovaltine factory.  The original building still stands, so does the giant smokestack. 

The truth to the origin of its name has to be here someplace.

I'm all over it.  More info when I figure it all out.