If the name (trademark) is potentially valuable, I would suggest you contact a TM lawyer. I am sure there are some in your area.
Years ago, the lawyers usually had an office in Wash, DC. Or, associated firm here. But, today. They can be anywhere. No different than our domain business. And, if the name is not potentially valuable. THen, don't bother going thru the effort. But, you are the only one that can make that decision.
A couple of lawyers on this forum would probably also do it for you.
However, I can not stress it stronger. Unless, you follow the TM business/law everyday. Then, you will leave a loophole in your filing. Or, you will cast a too large a net (category description) that will be immediately fought by other TM holders.
I know you don't want to hear this. But, it will pay in the long run to do it correctly.
I have over 30 yrs of business experience and I have learned it the hard way.