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PTAB finds implied support for a negative limitation

In re Martin, Appeal 2019-004372, April 29, 2020 Appellant FMC Corporation is the Applicant of US Patent Application Serial No. 15/289,566, which is directed to growth media.  Claim 1 recites: 1.  A method for improving the growth of plant comprising applying a growth effective amount of a plant growth composition comprising a hydrated aluminum-magnesium silicate […]