If the “modified” version is still substantially similar, there would be infringement

Is there free patent attorney organizations?

Some attorney will do some free work. I do not know of any organization that does so.

If a patent has expired; can anyone claim that patent and reissue it?

An expired patent is not extendable. The invention covered bt the patent is now public domain and anyone may use the patented invention.

It is likely that you will be sued or at least threatened with such a suit.

Trademark Law question regarding if whether or not a certain name could be used in the following scenario described below.

If your prospective competitor has a registration in English, most likely you'll be denied a registration. Your competitor when they find out you...

I want to know if i can use a name from a previously made game.

I recommend that you consult an attorney. Many complex issues are being raised by your question, and it would be a disservice to you for me to...

How do I find sample responses to trademark office action?

Check the trademark office upset.gov records for issued registrations.

Is a provisional patent recommended for a new process /app/ or software? if so, what is the process to obtain one?

Yes. At least file a provisional application. If possible consult with a patent attorney before you do so. If you cannot afford an attorney at...

The description of the goods and services cannot be substantially changed. It is possible to file in another class. This isn't a guarantee that...

Is it enough to change the "how" of a patent claim and not the "what?"

Most likely using it for a different purpose won't avoid infringement if the claim covers the structure of the tool. If the use is non-obvious, you...