A patent is only good for 17 or 20 years, depending on the date it was filed.
After that 17 or 20 years it is a free for all.
If someone can decipher the formula, anyone can produce it and sell it.
The use of the word Hy-Tran is a trademark thing and is a "live" trademark.
First registered on October 13, 1959.
Others can pay the trademark owners to have it on their label.
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