Thanks for providing the name of your country, TechnicGeek.
It looks like company does no longer exist.
If the company no longer exists and the company no longer has products that exist, or no longer offers services under the trademark, then you should be able to use the mark without issue. But you want to make sure your search for a trademark owner is a thorough one. Again, a trademark does not have to be registered in the US for the mark to be protected under US trademark laws.
This is on state level only is it not? That is unless they register on USPTO which gives interstate protection.
Again, no registration of any kind is necessary, state or federal. Trademark rights in the US are gained through the use of the mark as an identifier on goods or services. A trademark can be protected under both state laws and federal laws.
If company no longer exist, yet still has goods in marketplace sold under their trademark does that still pose a risk? Let me ask you this then; if company does not exist then this turns this issue to copyright? I mean does owner have copyright to this mark which will expire to public domain 70 years from now? Can trademark owner have case if company is no longer operational?
If a company no longer exists but it still has goods sold in the marketplace under the trademark, it can potentially pose a risk to anyone who wants to use the same trademark. The risk would not be a risk of infringement. A totally abandoned mark can be used. But the new user of the old trademark often has to compete with, or overcome, the memory of the old goods/services that once wore the brand.
The trademark belonging to a defunct company would not "turn" the issue into a copyright issue. If the company had a logo used as an identifier, however, the logo can potentially be protected under both trademark and copyright laws and the copyrights in a logo can survive the death of a company. It would depend on the logo and the creativity of its design.
The trademark on goods differs from company name slightly and it's by missing "INC" which company has like "Trademark INC"
The purpose of a trademark is to distinguish one company's goods or services from that of another. Only eliminating an "INC" from a name would not be enough to prevent consumers from confusing one trademark for another, if the goods or services being offered are in the same class or the trademark was a famous one.
Are you sure IP attorney in my country is more qualified than IP attorney in US?
I am sure that IP attorneys in Israel are as qualified as IP attorneys in the US. But you need to be concerned with the trademark laws in your country first. It will be under the laws of Israel that you will be sued. You can always hire a trademark attorney or agent in the US, or an international trademark attorney or agent, to do a thorough trademark search for you, though, if you are looking to register your trademark in more than one country.
Good luck, TechnicGeek.