发明授权
- 专利标题: Blendable writing instrument
- 专利标题(中): 可混合书写工具
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申请号: US255151申请日: 1994-06-07
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公开(公告)号: US5449399A公开(公告)日: 1995-09-12
- 发明人: Alexander C.-R. Tsuei , Daniel B. Pendergrass, Jr.
- 申请人: Alexander C.-R. Tsuei , Daniel B. Pendergrass, Jr.
- 申请人地址: MN St. Paul
- 专利权人: Minnesota Mining and Manufacturing Company
- 当前专利权人: Minnesota Mining and Manufacturing Company
- 当前专利权人地址: MN St. Paul
- 主分类号: B43K19/00
- IPC分类号: B43K19/00 ; C09D13/00 ; C09D11/12
摘要:
Writing instruments are provided comprising a) a friction transferable binder comprising a colorant, and b) frangible microcapsules containing a liquid solvent. The writing instrument contains sufficient microcapsules to provide a Coloration Uniformity Percentage (defined herein) of at least about 25%.
公开/授权文献
- US4767277A Fiber-filled polymer impeller 公开/授权日:1988-08-30
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