Was it true that Kramer had a spin-off for a short time?

Nope. Seinfeld was one of the few popular shows never to birth a spinoff. Where'd you hear that?

Maybe he's thinking of the Michael Richards Show.

Ohh, yeah. I've blocked that show from my memory, for the most part, so I didn't even think he was confusing that for a Kramer spinoff.

The only spinoff of Seinfeld, was a rumor about Jackie Chiles getting his own show.

Yeah, I remember that, but it never got any further than being discussed.

There was a rumor that the Costanza parents were being considered for a spinoff, but I don't know if that was true or not.

I never heard that one.

Just as well. It probably would have gotten old with the constant screaming matches.