Originally Posted by BlantonDetail
Oh that is very interesting, Setec! I would think though, there would be some completely different formulations or materials created by other labs/scientists/companies. I guess none of the major ones have "reinvented the wheel?"
The patent-holder was very aggressive in prosecuting infringement cases, and I guess they had a good patent, or good attorneys. They legally stopped the other two companies that were producing clay in the US in the late 90's/early 00's from selling it here. The problem is the patent really covered the "concept" of clay, so it's pretty hard to get around that and still be making clay.
As I alluded to, one of the patents expires late this year, although there are several others which are newer, so it's unclear to me when/if we will see more clay choices in this market. At least one of those two other companies still produces their clay for other markets.
All that being said, I just want to reinforce--all clay is NOT the same. Specific formulas exist for specific companies like Pinnacle, etc.