Buy dead patents

[Patent_Question]

What is the name of your state? FL
There are VERY old patents in the Uspto search that are from 1901, 1935, 1939, etc

I did a search with names, name of original invention, I tried if somebody 'resurrected' them, blah, blah... but that US patents are exactly look to be dead.

Now, How, what I do to contact who to know if I can buy (and resurrect) an old patent?

What is the process to 'resurrect' a 'dead' patent? I have to add/modify/update the old claims?

All that patents are as Utility patents of its era, so... what I do?

Is there an address to send my inquiry to the USPTO in my particular concern?

How much cost to buy a patent of that era?

can some relative of the original author(s) sue me? lol

 

[divgradcurl]

What is the name of your state? FL
There are VERY old patents in the Uspto search that are from 1901, 1935, 1939, etc

I did a search with names, name of original invention, I tried if somebody 'resurrected' them, blah, blah... but that US patents are exactly look to be dead.

Now, How, what I do to contact who to know if I can buy (and resurrect) an old patent?

What is the process to 'resurrect' a 'dead' patent? I have to add/modify/update the old claims?

All that patents are as Utility patents of its era, so... what I do?

Is there an address to send my inquiry to the USPTO in my particular concern?

How much cost to buy a patent of that era?

can some relative of the original author(s) sue me? lol

You can't "ressurect" a patent. Once a patent expires, it's expired for all time -- the invention moves into the public domain, and is free for all to use.