You can’t count on the USPTO to proofread your patent applications, especially for common mistakes like missing antecedent basis. For example, this 2006 study found that in a sample of 1600 patents issued by the USPTO:
We’re excited to announce new ClaimMaster release v. 4.7. This release includes many new improvements and fixes to our patent proofreading and automation tools. We’ve tried to improve the overall usability of the tool, while