I ended the chat early by mistake.
I wish to verify you have read the additional information below as it is important.
Single words are protected by Trademark Law.
"GROUPON" is a registered Trademark owned by Groupon, INc.
|Registration Number :||4222645|
Class of Goods
IC 035. US 100 101 102. G & S: Promoting the goods and services of others by providing a website featuring coupons, rebates, price-comparison information, product reviews, links to the retail websites of others, and discount information.
FIRST USE IN COMMERCE: 20081130 (November 30, 2008)
Thus, one would not be allowed to use the word "GROUPON" for promoting goods and services of others via coupons, rebates, etc.
Unless, one can prove they used the word "GROUPON" in commerce for promoting goods and services via coupons prior to November 30, 2008.