 The origin of GCLs can be traced back to 1962 when Arthur G. Clem filed a patent for preformed moisture impervious panels which combined bentonite clay with corrugated paperboard.In 1982, Arthur J. Clem filed a patent for a what would today be recognized as a GCL which combined bentonite clay, adhesive, and a geotextile.In that same year, Arthur J. Clem established Clem Environmental Corp to put his invention into production.