Return to sheetrock (thing)

Sheetrock is, in fact, a product name for [Drywall]/[Wall board]. Although it has passed into the common [lexicon] in the same manner as [Kleenex], it is still a [trademark]ed term. The registrant is the [United States Gypsum Company] of [Illinois], who have 'owned' it since [March] of [1922]; it underwent its most recent renewal in [1982], and will probably need another renewal in [2002].