Suppose a patent application is filed, claiming a method+device that solves some problem. In the patent text it is written that the method can solve A & B, but it explicitly mentions that it cannot solve C. A device is claimed that implements the method. The claim is however written too generic, and nothing is mentioned about the fact that C cannot be solved.
Suppose I invented a new different method, that actually can solve C. I implement it in the same type of device with similar steps as mentioned in the claim of the previous patent. So the claim of the previous patent may block my new patent, as my new invention is (strictly speaking) covered by the claim of the other patent.
Is it possible to successfully obtain a patent on my new invention? Can I for instance refer to the patent text of the previous application and point out that it explicitly mentions that it cannot solve C? How to deal with this?