[This is] the meaning that the term would have to a person of ordinary skill in the art in question at the time of the invention, i.e., as of the effective filing date of the patent application."
"heteroalkyl" a. Plaintiff's Proposed Construction: "Optionally substituted alkyl radicals in which one or more skeletal chain atoms is a heteroatom, e.g., oxygen, nitrogen, sulfur, silicon, phosphorus or combinations thereof.
c. Court's Construction : "Optionally substituted alkyl radicals in which one or more skeletal chain atoms is a heteroatom, e.g., oxygen, nitrogen, sulfur, silicon, phosphorus or combinations thereof.
Plaintiff argues that, consistent with Anderson, it would have been redundant for the asserted patents to explicitly state that the number of carbon atoms is bounded by some reasonable limit.
Not only is the specification "the single best guide" for claim construction, Phillips, 415 F.3d at 1315, but the patentee has "acted as his own lexicographer and clearly set forth a definition of the disputed term," CCS Fitness, Inc. v. Brunswick Corp., 288 F.3d 1359, 1366 (Fed. Cir. 2002).