Answer: you can sell the right to apply for a patent, not the patent right. Patents can only be sold after authorization. But the patent application right can also be sold, and the price is generally slightly lower than the patent right.
2. If you want to get the patent right early, how long after the application date can you apply for a real trial and publish the application?
A: At the same time as applying for a patent for invention, you can make a request for publication in advance and substantive examination. These requests can be made at any time if they are not made at the time of application.
3. Is there any limit on the maximum amount of patent transfer?
A: There is no ceiling. The highest transfer fee I have ever met is 80 million.