Invention Grant
- Patent Title: 3,3'-Dichloro-4,4-diaminodiphenyl sulfonic acids
- Patent Title (中): 3,3'-二氯-4,4-二氨基二苯基磺酸
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Application No.: US226008Application Date: 1988-07-29
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Publication No.: US4892968APublication Date: 1990-01-09
- Inventor: Colin D. Campbell
- Applicant: Colin D. Campbell
- Applicant Address: NY Ardsley
- Assignee: Ciba-Geigy Corporation
- Current Assignee: Ciba-Geigy Corporation
- Current Assignee Address: NY Ardsley
- Priority: GBX8718798 19870807
- Main IPC: C07C309/76
- IPC: C07C309/76 ; C07C67/00 ; C07C301/00 ; C07C303/06 ; C09B35/10
Abstract:
The invention provides compounds having the formula I or II ##STR1## and their salts and hydrates, having high value as intermediates for dyestuff additives for pigment compositions and as intermediates for metal-containing pigments.
Public/Granted literature
- US5500620A Timing recovery for digital demodulation Public/Granted day:1996-03-19
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