Wednesday, January 20, 2021 As a non-precedential decision on claim construction, Horizon Pharma, Inc. v. Dr. Reddy’s Laboratories Inc., may not be relevant to any other case, but it caught my attention as an example of the perils of claim drafting. Claim language mirroring language in the specification that the examiner considered without difficulty during prosecution was held indefinite as being “nonsensical.” The Claim Language At Issue The claim language at issue is found in claim 1 of U.S. Patent No. 9,220,698, which is partially reproduced below with emphasis added: 1. A method for treating osteoarthritis, rheumatoid arthritis, or ankylosing spondylitis comprising orally administering to a patient in need thereof an AM unit dose form and … a PM unit dose form, wherein: