CLYDE-WARE COOKWARE (POTS & PANS)?

I am looking for any information on Cylde-Ware Cookware (pots & pans). I have been unable to find anything online about them. I do know, from the back of them, that they are stainless, 18-8, and mfg in Chicago, IL. I would like to know if they are oven-proof and if so, to what temp. The lids are solid, not glass. Thanks for the help!