The above problems are related to the development of the situation, but in any case:
1. How much do I have to pay for the patent book?
For the part before the announcement of his patent authorization, because the patent right has not yet been produced, you have no infringement and you don't need compensation at all.
2. If I stop producing and selling this product before the other party gets the patent, do I still need compensation?
No need. The answer is the same as 1.
3. The products of the other party are completely transparent. If the body (pen) of my pen is solid color, does it still constitute infringement?
This is not clear. Because similarity seems to be infringement. Depending on whether they are similar or not.
4. Is it illegal for the other party to indicate the patent number on the product before the patent is approved?
Yes, patents that are not approved cannot be marked. You can report to the industry and commerce department and the intellectual property law enforcement department.
The other party is also a similar product that imitates a patent on the market, but the shape has been modified, but the printed part of the pen body is still similar to that one, and the marked model is the same. Is the other party's patent still valid?
It doesn't have to be like this. It depends on whether his patent application is the same as or similar to the existing design.
In fact, if you make the product or make preparations for making the product before his application date, but it does not constitute publicity, you have the right to use it first, and you can continue to make it within the scope determined before the application date.
If you have published the product or design drawings before his application date, you can:
1, which destroys the novelty of the design application, may request the Patent Reexamination Board to declare its patent invalid.
Even if he accuses you of infringement, you can defend it with freely known technology.