Magnetic writing screen dispersion medium

Details Magnetic writing screen dispersion medium Magnetic writing screen dispersion medium

2005-04-12

2005-04-12

Koslow, C. Melissa (Department: 1755)

Compositions

Magnetic

Flaw detection or magnetic clutch

C252S062530, C252S062540, C252S062550, C252S06251C, C434S409000

Reexamination Certificate

active

06878306

ABSTRACT:
A magnetic dispersion medium is used in a magnetic writing screen toy. The dispersion medium is attracted to the underside of the screen when a magnetic tipped pen is passed over the upper surface of the screen. A user can create drawings and figures. The dispersion medium is non-toxic, creates lines having good contrast and can be easily erased without permanently forming black marks on the screen. The dispersion medium works well in temperature ranges between −20° C. to 45° C.

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