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:
Mar. 10, 1981
Filed:
Jun. 08, 1979
Peter A Isaac, Summit, NJ (US);
Engelhard Minerals & Chemicals Corporation, Edison, NJ (US);
Abstract
Novel pressure-sensitive manifold record material comprises paper coated on one side with an encapsulated solution of an alkali-sensitive color precursor such as phenolphthalein in a polar solvent and coated on the reverse side or on a separate sheet of paper with particles of a white alkaline pigment such as fluid energy milled lime. The sheets are assembled for manifold record material by stacking sheet material coated with encapsulated dye solution in face-to-face relationship with surfaces coated with alkaline pigment. Upon rupture of the capsules by printing pressure, a colored mark is formed on the surface containing the alkaline pigment particles.