RAW MATERIALS The Company operates in an integrated manufacturing environment. Basic raw materials are processed through many stages to produce a number of products that are sold as finished goods at various points in those processes. The major raw material stream that feeds the production of the Company's finished goods is hydrocarbon-based raw materials. The Company purchases hydrocarbon raw materials including ethane, propane, butane, naphtha and condensate as feedstocks. These raw materials are used in the production of both saleable products and energy. The Company also purchases and sells certain monomers, primarily ethylene and propylene, to balance internal production and internal consumption. The Company purchases natural gas, primarily to generate electricity, and purchases electric power to supplement internal generation. In addition, the Company produces a portion of its electricity needs in Louisiana and Texas; Alberta, Canada; The Netherlands; and Germany. The Company's primary source of these raw materials are natural gas liquids ("NGLs"), which are derived from natural gas and crude oil production, and naphtha, which is produced during the processing and refining of crude oil. Given recent advancements in shale gas, shale oil and conventional drilling techniques, the Company expects these raw materials to be in abundant supply. The Company's suppliers of these raw materials include regional, international and national oil and gas companies. The Company purchases raw materials on both short- and long-term contracts. The Company had adequate supplies of raw materials in 2021 and expects to continue to have adequate supplies of raw materials in 2022 . INDUSTRY SEGMENTS AND GEOGRAPHIC REGION RESULTS See Note 26 to the Consolidated Financial Statements for information regarding net sales, pro forma net sales, Operating EBIT, pro forma Operating EBIT and total assets by segment, as well as net sales and long-lived assets by geographic region. SIGNIFICANT CUSTOMERS AND PRODUCTS All products and services are marketed primarily through the Company’s sales force, although in some instances more emphasis is placed on sales through distributors. In 2021 , no significant portion of the Company's sales was dependent upon a single customer. PATENTS, LICENSES AND TRADEMARKS The Company continually applies for and obtains U.S. and foreign patents and has a substantial number of pending patent applications throughout the world. At December 31, 2021 , the Company owned approximately 3,600 active U.S. patents and 21,300 active foreign patents as follows: Remaining Life of Patents Owned at Dec 31, 2021 United States Rest of World Within 5 years 700 3,800 6 to 10 years 1,200 7,400 11 to 15 years 1,500 9,500 16 to 20 years 200 600 Total 3,600 21,300 The Company’s primary purpose in obtaining patents is to protect the results of its research for use in operations and licensing. The Company is party to a substantial number of patent licenses, including intellectual property cross-license agreements and other technology agreements, and also has a substantial number of trademarks and trademark registrations in the United States and in other countries, including the “Dow in Diamond” trademark. Although the Company considers that its patents, licenses and trademarks in the aggregate constitute a valuable asset, it does not regard its business as being materially dependent on any single or group of related patents, licenses or trademarks. 15