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Subject Postage stamps Remove constraint Subject: Postage stamps Date 1976 Remove constraint Date: 1976

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    • after 1950 – before 1995

    Stamp depicts profile of Fritz Haber who received the Nobel Prize in Chemistry in 1918 for developing a process to synthesize ammonia from nitrogen and hydrogen gas, which allowed for the large-scale synthesis of…

    • 1976

    Depicts William Wrigley Jr., as well as a worker tapping a sapodilla tree, which was used to manufacture bubble gum. Includes the bicentennial logo of the American Revolution.

    • 1976

    Cachet created by ArtCraft depicts a male and female chemist working in a laboratory setting, with text reading, "A Century of Modern Chemistry." Cover signed by Glen Seaborg.

    • 1976

    First day cover created by Artmaster includes cachet depicting a 3D image of a nonexistent molecule. Stamp depicts chemical glassware. Envelope is signed by Herman S. Bloch, the inventor of the catalytic converter.