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In 1973, six wallboard manufacturers (including USG) were charged with violating §1 of the Sherman Act during the period 1960–1973, through engaging in a combination and conspiracy in restraint of interstate trade and commerce in the manufacture and sale of gypsum board. In July 1975, after the jury was committed to deliberate, it became ...
Magnesia boards are used in place of traditional gypsum drywall as wall and ceiling covering material and sheathing. It is also used in other construction applications such as fascias, soffit , shaft-liner and area separation, wall sheathing, and as tile backing (backer board) or as substrates for coatings and insulated systems such as finish ...
Various sized cuts of 1 ⁄ 2 in (13 mm) drywall with tools for maintenance and installation . Drywall (also called plasterboard, dry lining, [1] wallboard, sheet rock, gib board, gypsum board, buster board, turtles board, slap board, custard board, gypsum panel and gyprock) is a panel made of calcium sulfate dihydrate (), with or without additives, typically extruded between thick sheets of ...
United States v. United States Gypsum Co. was a patent–antitrust case in which the United States Supreme Court decided, first, in 1948, [1] that a patent licensing program that fixed prices of many licensees and regimented an entire industry violated the antitrust laws, and then, decided in 1950, [2] after a remand, that appropriate relief in such cases did not extend so far as to permit ...
It has 17 gypsum board plants in the US and presents itself as a fully integrated building products manufacturer. [1] It is a private company, incorporated as New NGC, Inc. in 1993 after previously filing for Chapter 11 bankruptcy in 1990. [2] In 1995, Clemmie Spangler took over National Gypsum for $1.2 billion, through Delcor Inc., a private ...
As of 2013, USG manufactures sheetrock drywall and ready-mixed joint compound at the plant, employing 230 people, down from 380 in 2004. [ 5 ] [ 7 ] In 2013, the mine, which remained abandoned for over 40 years began collapsing as water dissolved some of the underground gypsum rock, primarily calcium sulfate, resulting in depressions and ...