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:
Sep. 09, 1986
Filed:
Feb. 27, 1984
James A Ford, Hinsdale, IL (US);
Other;
Abstract
A process and apparatus are disclosed for treatment of crystalline, particulate phthalocyanine pigments, and particularly for green shade phthalocyanine blue pigments. To effect development of the pigment tinctorial strength by reduction of the pigment particle size, the pigment particles are repeatedly impacted against relatively fixed impact plates by entrainment in moving air streams. Repeated impacting of the particulate pigment provides significant reduction in its particle size and significant development of the tinctorial strength of the pigment. It is presently preferred that the impacting steps be carried out in conjunction with subsequent viscous grinding of the partially developed pigment. This combination of treatment steps has been found to provide a resultant product of significantly enhanced tinctorial strength, while at the same time affording significant savings in materials, process time, and energy usage.