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:
Jan. 13, 1981
Filed:
May. 23, 1979
William J Fraser, Forrest Lake, MN (US);
Minnesota Mining and Manufacturing Company, Saint Paul, MN (US);
Abstract
A composition capable of reducing image-offset when used in combination with color-forming compounds which are capable of forming colored images with color-developing coreactants. The composition comprises an aliphatic tertiary amine image-offset control agent. Color-forming compounds such as dithiooxamide, dithiooxamide derivatives and certain aromatic substituted hydrazones, may also be included in the composition. The invention when employed in the art of carbonless paper enables the production of dark, black images in areas of a paper substrate containing color-forming compositions and transition metal color-developing compositions, without image-offsetting in areas not containing both the color-forming compound and the color-developing compound, even upon stacking color-forming compound containing sheets on top of color-developing compound containing sheets.