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:
Jun. 08, 1993
Filed:
Dec. 19, 1988
Applicant:
Inventors:
Nan J Lin, Burlington, MA (US);
Peter G Hanley, Milford, MA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B42D / ; B32B / ; C09K / ;
U.S. Cl.
CPC ...
281 151 ; 106 / ; 106 32 ; 106 325 ; 270 37 ; 270 53 ; 281 51 ; 428207 ; 4283088 ; 4283213 ; 428327 ; 428511 ;
Abstract
An erasable system including an element having a porous marking surface and an erasable marking composition for applying markings to the porous marking surface. The marking composition comprises an aqueous dispersion of particles of film-forming polymeric materials and a colorant, and the marking composition provides an erasable, substantially water-insoluble coalesced residue on the marking surface.