Back to results
US 4,727,162 AGranted
Molecular compound of fluoran compound and ketone
AssigneeShin Nisso Kako Co., Ltd.
InventorsMasakichi Yahagi, Tetsuo Igaki
Life of this patent
Estimating the term…
Abstract
A molecular compound of a fluoran compound and a ketone useful as a color former for heat or pressure-sensitive color-developable recording material.
Claims3
A compound of a formula:
- ##STR7## (wherein R is methyl or ethyl.).
Dependencies are inferred from the claim text.