发明授权
- 专利标题: Pressure sensitive recording sheet
- 专利标题(中): 压力敏感记录表
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申请号: US3730754D申请日: 1971-10-01
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公开(公告)号: US3730754A公开(公告)日: 1973-05-01
- 发明人: FARBER S , WRIGHT 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
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.
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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