Please, never react just because a lawyer sends a single email (especially when you have no profit motive and do open source).
You have time to react to serious issues, including after accidentally deleting the first few emails. Trademarks are different from patents. Pre-grant and/or post-grant opposition for a single generic word is a relatively easy way to kill it.
You have time to react to serious issues, including after accidentally deleting the first few emails. Trademarks are different from patents. Pre-grant and/or post-grant opposition for a single generic word is a relatively easy way to kill it.
'copilot' https://uspto.report/Search/copilot `269 Results`
In related note, Microsoft once tried so hard to trademark "Bookself" (type code GS0091) https://uspto.report/TM/74567299 `Dead/Cancelled`