Which country is the patented technology of supramolecular salicylic acid?

Salicylsalicylic acid can react with sodium bicarbonate to generate sodium acetylsalicylate, and carbon dioxide and water acetylsalicylic acid can react with sodium bicarbonate to generate water-soluble sodium salt, while its by-product polymer can't be dissolved in sodium bicarbonate solution to generate sodium acetylsalicylate, which is a water-soluble organic salt.