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PPG expanded quickly. By 1900, known as the "Glass Trust", it included 10 plants, had a 65 percent share of the U.S. plate glass market, and had become the nation's second largest producer of paint. [4] Today, known as PPG Industries, the company is a multibillion-dollar, Fortune 500 corporation with 150 manufacturing locations around the world.
The Marsh Plate Glass Company built a plant to use the new technology, which was purchased by Pittsburg Plate Glass Company before 1901. [52] In addition to the two just–mentioned companies, the Edward Ford Plate Glass Company became involved with continuous lehrs for plate glass in 1900. [52]
Two large stained-glass windows installed by Hartford City Glass Company's Belgian glass workers A New England Glass Company ewer , 1840–1860 A Novelty Glass Company advertisement in 1891 An electrical insulator made by Whitall Tatum Company , circa 1922
Initially, the Pittsburgh-based company consisted of 16 unionized glassworks. [118] Each factory became known by a letter (e.g. Factory A of United States Glass Company). [119] Hobbs Glass Company became Factory H, and more key talent immediately left the company, including Kopp. [120]
Factory L - O'Hara Glass Co., Pittsburgh, Pennsylvania (1891–1893) 30th St. and A.V.R.R. Factory M - Bellaire Goblet Co., Findlay, Ohio, (1891–1892) Factory N - Nickel Plate Glass, Fostoria, Ohio (1891–1894) Factory O - Central Glass, Wheeling, West Virginia (1891–1895, then resold) [9] Factory P - Doyle & Co., Pittsburgh, Pennsylvania ...
Mirror plates prior to the invention had been made from blown "sheet" glass, and were consequently very limited in size. De Nehou's process of rolling molten glass poured on an iron table rendered the manufacture of very large plates possible. [2] In 1773 English polished plate (by the French process) was produced at Ravenhead.