Lactones of the benzaxanthere series and dye-forming components for use in duplication processes
US3946017A · kind A · utility
2Cited by
1References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 24, 1974 |
| Grant date | Mar 23, 1976 |
| Priority date | — |
| Expiry date | Jan 24, 1994 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M5/1455
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Lactones of the benzazaxanthene series based on 4-dialkylaminobenzoic acid compounds and homophthalic acid imides. The new lactones are eminently suitable as dye-forming components in the red range for pressure-sensitive recording material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.