Thank you SO much for this information Bert! They are indeed made by Cornell Dubilier (sorry I forgot to mention that). My father is the one who procured them nearly 10 years ago. They do not have the date they were created on them. He stored them in my garage and has not taken responsibility for them.
Recently I began packing up to move and found them again.
I have had several people make offers to buy them. One person asked $300 per capacitor! I don't want to sell them if they are harmful, though.
Thank you again for giving me such extensive information. I will see where in my city I can take them to dispose of them.
I am located in Santa Cruz, California.
Thanks for all your help!