Charles Albert Crampton, M.D. (1858–1915) was an American chemist, born at Davenport, Iowa.
 He was educated at Purdue (A.C.) and the University of Michigan (Ph.C.)
.
 He served as assistant chemist in the United States Department of Agriculture, and became chief chemist of the Internal Revenue Bureau in 1893.
Professor Akiko Kobayashi (小林 昭子 , Kobayashi Akiko , born 1943) is a Japanese chemist born in Tokyo.
 She is the designer and creator of Ni(tmdt)2, the world's first single-component molecular metal.
Earl Muetterties (June 23, 1927 – January 12, 1984), was an American inorganic chemist born in Illinois, who is known for his experimental work with boranes, homogeneous catalysis, heterogeneous catalysis, fluxional processes in organometallic complexes and apicophilicity.
Robert Runnels Williams (February 16, 1886 – October 2, 1965) was an American chemist, known for being the first to synthesize thiamine (vitamin B).
 He first isolated thiamine in 1933, and synthesized vitamin B in 1935.
 Among his awards were the Elliott Cresson Medal in 1940 and the Perkin Medal in 1947.
 His brother was Roger J. Williams, another important chemist at the time and discoverer of Vitamin B5.
Professor Jean M.J. Fréchet (born August 19, 1944, Burgundy, France), American chemist, is a Professor Emeritus at the University of California, Berkeley.
 In addition, he is the head of Materials Synthesis, Materials Science Division,of the Lawrence Berkeley National Laboratory, Director of the Organic and Macromolecular Facility for the Molecular Foundry, Lawrence Berkeley National Laboratory, and Vice-President for research at King Abdullah University of Science and Technology.
 He has authored nearly 900 scientific papers and holds over 70 United States Patents.
 His research areas include organic synthesis and polymer chemistry applied to nanoscience and nanotechnology with emphasis on the design, fundamental understanding, synthesis, and applications of functional macromolecules.
 He was a good friend of influential American chemist Linus Pauling and consistently mentions him in his organic chemistry lectures.
 As of March 2011, he is 16th on the Hirsch index rating of all living chemists with an H-index of 105.
 He is an elected fellow of the American Association for the Advancement of Science, the American Chemical Society, and the American Academy of Arts and Sciences, and an elected member of the US National Academy of Sciences, the US National Academy of Engineering, and the Academy of Europe (Academia Europaea).
Alma Levant Hayden (March 30, 1927 – August 2, 1967) was an American chemist, and one of the first African-American women to gain a scientist position at a science agency in Washington, D.C.
 She joined the National Institutes of Health (NIH) in the 1950s.
 Hayden graduated from Howard University with a master's degree in chemistry, and became an expert in spectrophotometry, the measurement of how substances absorb light.
 She published work on infrared and other techniques for analyzing chemicals in a range of journals.
 Hayden was appointed Chief of the Spectrophotometer Research Branch in the Division of Pharmaceutical Chemistry at the U.S. Food and Drug Administration (FDA) in 1963, and may have been the first African-American scientist at the FDA.
 Hayden came to national attention in 1963 when she led the team that exposed the common substance in Krebiozen, a long-controversial alternative and expensive drug promoted as anti-cancer.
 Hayden was married to fellow research chemist Alonzo Hayden, and had two children.
 She died in 1967.
Linus Carl Pauling (February 28, 1901 – August 19, 1994) was an American chemist, biochemist, peace activist, author, and educator.
 He published more than 1,200 papers and books, of which about 850 dealt with scientific topics. "
New Scientist" called him one of the 20 greatest scientists of all time, and as of 2000, he was rated the 16th most important scientist in history.
The Hunter process was the first industrial process to produce pure ductile metallic titanium.
 It was invented in 1910 by Matthew A. Hunter, a chemist born in New Zealand, who worked in the US.
 The process involves reducing titanium tetrachloride (TiCl) with sodium (Na) in a batch reactor with an inert atmosphere at a temperature of 1,000°C.
 Dilute hydrochloric acid is then used to leach the salt from the product.
In statistical mechanics, the ice-type models or six-vertex models are a family of vertex models for crystal lattices with hydrogen bonds.
 The first such model was introduced by Linus Pauling in 1935 to account for the residual entropy of water ice.
 Variants have been proposed as models of certain ferroelectric and antiferroelectric crystals.
Gustavus John Esselen (1888–1952) was an American chemist born in Roxbury, Boston, Massachusetts.
 He studied at Harvard University where he was awarded the A.B. (magna cum laude) in chemistry in 1909 and a doctorate in 1912.
 Until 1921 he was a member of the research staff of General Electric and then of Arthur D. Little.
 There with Little and Wallace Murray he contrived to make a 'silk' purse from reconstituted collagen extracted from a sow's ear.
 In 1930 he founded Gustavus J. Esselen, Inc., which following a merger, became Esselen Research Division of United States Testing Co., Inc.
 Among the successful projects for industrial clients he was involved with was the development of anhydride curing agents for epoxy resins and polyvinyl butyral as an improved material for the subsequent commercialization of laminated glass for use in vehicles etc.
 More than 40 U.S. patents were issued as a result of his research efforts.
 He was a member of the American Chemical Society for 43 years, twice chairman of the Northeastern Section (1922–23) and served as councilor and director of the national organization.
 From 1919 to 1951 he was chairman of the American Section of the Society of Chemical Industry.
 Prior to World War II he was a reserve officer in the U.S. Army's Chemical Warfare Service.
 During the war he was a committee chairman with the Office of Scientific Research and Development.

Question: When was the American Chemist born, who introduced the first Ice-type model?
Answer: February 28, 1901