Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1994-02-28
1995-02-14
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
523160, 523161, 523164, C09D 1110, C09D 1300, C08L 5302
Patent
active
053897170
ABSTRACT:
An erasable marking composition comprising a noncarboxylated styrene-butadiene copolymer resin, a colorant, and a solvent. The composition can be applied to substrates by a variety of delivery means, such as porous-tipped and brush-tipped writing instruments, as well as brushes, and can be easily erased with a substantially nonabrasive eraser, such as a common pencil eraser, for an extended period of time.
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Miller Richard E.
Santini Andree
Asinovsky Olga
Binney & Smith Inc.
Michl Paul R.
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