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US 5,471,786 AGranted
Plant growing medium containing mineral fibers
AssigneeRockwool International A/S
InventorUlf A. Clausen
Life of this patent
Estimating the term…
Abstract
A mineral fibre containing plant growing medium comprising lignite has ion exchange capacity and improved water retention properties and does not require disinfection before use.
Claims7
Plant growing medium comprising mineral fibers and an agent for increasing water retention ability, said agent consisting of lignite which on a water free and ash free basis comprises from about 60 to about 75 percent by weight of carbon, from about 17 to about 33 percent by weight of oxygen and from about 3 to about 8 percent by weight of hydrogen.
Dependencies are inferred from the claim text.