发明授权
- 专利标题: Tetracarboxylic acids
- 专利标题(中): 四羧酸
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申请号: US326717申请日: 1981-12-02
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公开(公告)号: US4421929A公开(公告)日: 1983-12-20
- 发明人: Edmund P. Woo
- 申请人: Edmund P. Woo
- 申请人地址: MI Midland
- 专利权人: The Dow Chemical Company
- 当前专利权人: The Dow Chemical Company
- 当前专利权人地址: MI Midland
- 主分类号: C07C57/34
- IPC分类号: C07C57/34 ; C07C59/00 ; C08G73/10 ; C07C65/00
摘要:
Novel tetracarboxylic acids are described of the formula ##STR1## wherein Ar, R.sub.1 and R.sub.2 are named substituents, and both n's are zeros or ones.
公开/授权文献
- US4896522A Rotatable coupling for fastener installation tool 公开/授权日:1990-01-30
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