What is the essential difference between the patent of pharmaceutical ingredients and the patent of pharmaceutical preparations?

Patent of pharmaceutical composition and patent of pharmaceutical preparation are classified from two different angles, and they are not comparable. Pharmaceutical ingredient patent is the classification of patent workers, which is related to compound patent and ingredient patent in product patent. Composition patents can be roughly divided into composition patents (unilateral or compound) and preparation technology patents, while preparation technology belongs to method patents. Preparation patents are classified from the perspective of R&D technicians, and there are drug patents such as API patents, preparation patents, compound patents and indications patents. Preparation patents can be divided into preparation technology patents, preparation prescription patents and prescription+structure or technology so-called dosage form patents. Different classifiers, different benchmarks and different emphases. Therefore, if you are dealing with patent practitioners, when dealing with R&D technicians, you will use the word pharmaceutical composition patent and the word pharmaceutical preparation patent, but understand that their connotations are different.