Does trademarking a partial phrase allow me the flexibility to add on and still be protected?

Question

Example: DONE RIGHT (trademarked) vs. ALWAYS DONE RIGHT or LIBERTY DONE RIGHT

Answer 1

"Trademarking" gives you very limited protection.

The only real (monetary damages) protection comes from registering your slogan with the US Patent and Trademark office.
See www.uspto.gov.

Having registered a partial phrase does not, in itself. Should you be given registration for DONE RIGHT, you might find that somebody already has the phrase "Chicken Done Right" as their registered phrase. And even though McDonald's may have ownership of that phrase, they don't necessarily have open-ended future rights to, say, "Manicures Done Right."

Trademark rights are not (with some exceptions) granted with a broad market. In most cases, the name/slogan is protected within a particular industry.

Answer 2

No, that would require a new search & new filing. A good way to think about it is that whatever you submit to the USPTO is how you should be presenting yourself to your customers/clients. So adding or deleting text alters the mark in the eyes of your customers/clients as well as the USPTO.

Hope that helps!