The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 24, 2022
Filed:
Sep. 05, 2016
Societe Bic, Clichy, FR;
Bagavant Shivkumar, Merseyside, GB;
Philippe Marrec, Lannion, FR;
Societe BIC, Clichy, FR;
Abstract
Novel reaction media for electron donating and electron accepting components in colour-change compositions are described. The compound is of formula (I): wherein R, and Rare selected from a linear or branched alkyl group, alkenyl group, alkoxy group, aryl group and an alkylene aryl group having from 6 to 22 carbon atoms; Xand Xare selected from —OC(O)—, —CO— and O; R, Rand Rare selected from hydrogen and an linear or branched alkyl group, cycloalkyl group, alkenyl group, alkoxy group, aryl and alkylene aryl group; Ris selected from hydrogen, R, —XRand aryl and halogen; YYYand Yare selected from hydrogen, R, —ORand halogen; a is 0 to 4; b is 0 or 1; x and y are independently is 0 or 1 provided that where x and y are 0, a is 0 and b is 1 and Ris —COR; and wherein when a is 0 and b is 1 and Ror Ris phenyl, Rand Rrespectively are not hydrogen or Calkyl. The compounds are useful in ink compositions, writing implements containing the compound and medical and industrial applications in which temperature sensitive colour change may be required.