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:
Dec. 11, 1990
Filed:
May. 12, 1989
Applicant:
Inventors:
Rong-Chang Liang, Centerville, OH (US);
William H Simpson, Centerville, OH (US);
Katherine A Gyure, Miamisburg, OH (US);
Kenneth P Carpenter, Dayton, OH (US);
Assignee:
The Mead Corporation, Dayton, OH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03C / ; C08F / ; A61J / ;
U.S. Cl.
CPC ...
430138 ; 430621 ; 430629 ; 430634 ; 430635 ; 430636 ; 526240 ; 526258 ; 526287 ; 546341 ; 562 42 ; 562105 ; 562107 ; 562109 ; 264-41 ; 264-47 ; 4284022 ; 42840221 ;
Abstract
A method for forming microcapsules by enwrapping an oily core material in a formaldehyde condensation product formed in situ wherein a dispersant is used of the formula (I): ##STR1## where: M is an alkali metal cation or a quaternary ammonium group,