发明授权
US3730754A Pressure sensitive recording sheet 失效
压力敏感记录表

  • 专利标题: Pressure sensitive recording sheet
  • 专利标题(中): 压力敏感记录表
  • 申请号: US3730754D
    申请日: 1971-10-01
  • 公开(公告)号: US3730754A
    公开(公告)日: 1973-05-01
  • 发明人: FARBER SWRIGHT A
  • 申请人: NCR CO
  • 专利权人: NCR Corp
  • 当前专利权人: NCR Corp
  • 优先权: US8664470 1970-11-03; US18580071 1971-10-01
  • 主分类号: B41M5/145
  • IPC分类号: B41M5/145 C09B11/24 B41M5/16
Pressure sensitive recording sheet
摘要:
A PRESSURE-SENSITIVE RECORD UNIT AND A MARK-FORMING UNIT ARE DISCLOSED WHICH EMPLOY A CHROMOGENIC MATERIAL OF NORMALLY COLORLESS FORM HAVING A STRUCTURAL FORMULA:

4'',5'',6'',7''-TETRA(CL-),3''-(O=),9-((R)2-N-)SPIRO(12H-BENZO-

(A)XANTHENE-12,1''-PHTHALAN), AND 4'',5'',6'',7''-TETRA(CL-),

3''-(O=),9,4-DI((R)2-N-)SPIRO(12H-BENZO(A)XANTHENE-12,1''-

PHTHALAN)

WHEREIN EACH R IS HYDROGEN OR AN ALKYL RADICAL HAVING 1 TO 4 CARBON ATOMS.
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