Medmix Switzerland AG v. Squires

Medmix Switzerland AG v. Squires The Federal Circuit affirmed the Board's construction of “at least two ramps” as not requiring an inclined-plane shape. Substantial evidence supported the Board's motivation-to-combine findings, including its finding that leakage/backpressure concerns could be mitigated. The decision reinforces that preferred embodiments and prosecution amendments will not narrow otherwise broad claim language absent a clear intrinsic record limiting the disputed term. Affirmed the PTAB's final written decision holding the challenged claims unpatentable as obvious. The challenged patent covers a cartridge, mixer/accessory part, and connecting device using guide grooves and ramps to attach and release the mixer in an axially guided manner. Medmix argued that “at least two ramps” required an inclined-plane shape, relying on figures, specification language, and prosecution history; the court held the claim text and specification did not impose that shape requirement. The prosecution amendment adding ramps and guide grooves distinguished prior art based on guided axial release, not on any specific ramp geometry. On obviousness, the Board found a skilled artisan would have been motivated to incorporate Yu's coarse-thread connection into Keller '574 or Heusser for mechanical advantages. The court rejected Medmix's Henny Penny-based argument because the Board considered the alleged disadvantages and found substantial evidence that backpressure/leakage concerns could be addressed with tangs and flanges. § 103 claim construction non-precedential § 103 claim construction non-precedential § 103 claim construction non-precedential