Record receiver having plural interactive leaves or a colorless – Having a colorless color-former – developer therefor – or... – Method of use – kit – or combined with marking instrument or...
Patent
1988-08-25
1990-02-20
Hess, Bruce H.
Record receiver having plural interactive leaves or a colorless
Having a colorless color-former, developer therefor, or...
Method of use, kit, or combined with marking instrument or...
427150, 428704, 428914, 503200, 503211, 503217, 503226, B41M 516, B41M 522
Patent
active
049026682
ABSTRACT:
Pressure sensitive imaging materials are stable until pressure addressed, but thereafter provide an intense dark image. The materials comprise colorless ferric organophosphate, ferric organophosphinate, or ferric organophosphonate and a colored chelate.
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Albin Loren D.
Whitcomb David R.
Hess Bruce H.
Kirn Walter N.
Litman Mark A.
Minnesota Mining and Manufacturing Company
Sell Donald M.
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