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:
Jun. 30, 1981
Filed:
Jul. 18, 1979
Grannis S Johnson, Plainfield, NJ (US);
Ira M Rose, Millburn, NJ (US);
Diamond Shamrock Corporation, Dallas, TX (US);
Abstract
Pressure sensitive recording sheets are prepared characterized by containing on one side thereof color former dissolved in a solvent which is one or a mixture of alkoxy diphenyl alkanes having the following structure: ##STR1## where R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are H or a straight or branched chain alkyl group of 1 to 8 carbon atoms and can be the same or different; R.sub.5 is a straight or branched chain alkyl group of 1 to 9 carbon atoms; R.sub.6 is a straight or branched chain alkyl group of 1 to 8 carbon atoms; x is 0, 1 or 2; y is 1 or 2 and n is 1 or 2, with the proviso that the sum of the carbon atoms in R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 does not exceed 9 and with the further proviso that where the alkoxy diphenyl alkane is a solid to viscous liquid, at least one diluent or at least one other generally liquid solvent or mixture thereof is present. The treated side of the sheet is brought into contact with a developer. Upon application of pressure, color is produced by reaction between the color former and the developer.