Don’t Convert to R134a

"Factless conspiracy theories that refuse to die for a thousand, Alex!"

US patents last 20 years. The patent on R12 would have expired in 1948.

So yeah, your memory was serving you there, but what it was serving you was less like new oats and more like used ones.
Dan, with the people skills you've demonstrated, I would not expect you to understand "business ethics". Should I submit any memory I wish to share to you for concurrence before posting or is more whining to be expected?