发明授权
US4514481A 4H-Thiopyran-1,1-dioxide and electrophotographic layers and elements comprising same 失效
4H-噻喃-1,1-二氧化物和电子照相层以及包含它们的元件

4H-Thiopyran-1,1-dioxide and electrophotographic layers and elements
comprising same
摘要:
Novel 4H-thiopyran-1,1-dioxides are disclosed. They are useful as electron transporters in electrophotographic layers and elements.
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