Can I apply for a patent for a product transformed from the existing technology?

This depends on whether the specific transformation technology is innovative. For example, the original product of Company A has the four technical characteristics of ABCD, and the newly transformed product of Company B has the new technical characteristics of ABCDE, so you can apply for a patent.

However, it should be noted that if B's product is not licensed by A, it will infringe A's patent right. However, Party B may negotiate with Party A and ask Party A for permission to exploit Party A's patent, and may also apply for compulsory license if necessary. In addition, Party A and Party B can also cross-authorize.

What needs to be added is that if the technical feature of Party B's newly transformed product is ABCE, it can be directly implemented without obtaining the patent permission of Party A after applying for a patent.