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:
Oct. 01, 1991
Filed:
Feb. 18, 1987
Applicant:
Inventor:
Anthony E Vassiliades, Cincinnati, OH (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J / ; B01J / ;
U.S. Cl.
CPC ...
4284022 ; 8526 ; 264-41 ; 264-43 ; 264-47 ; 42840221 ; 503213 ;
Abstract
The present invention comprises a pressure-sensitive chromogenic copy system comprising a transfer sheet having on at least a portion of at least one surface thereof a coating of microcapsules having encapsulated therein a solution in an oleophilic solvent of the reaction product of at least one leuco chromogenic compound and at least one electron-accepting color developer capable of reacting with said leuco chromogenic compound in an oleophilic solvent; the oleophilic solvent being a solvent for said leuco chromogenic compound, said color developer and said reaction product. The invention also comprises the transfer sheets, microcapsules, and method of making such microcapsules.