Even well-written claims are very hard to understand. Adding poor grammar to the mix makes claims painful to read and possibly more vulnerable to invalidity arguments in litigation.
Let's start with a couple of questions...
Is a patent claim a sentence?
Nope. It looks like a sentence. After all, it starts with a capital letter and ends with a period. But there is one important thing missing. A patent claim does not ever have a verb.
So what is a patent claim?
Each patent claim is a REALLY long noun. The noun is something like a method, system, or a non-transitory, computer-readable medium. All of the words that come after the noun just provide details of that noun.
Let's take an example: