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Date of decision
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08 August 2007
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Case number
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T 0538/02
- 3.3.06
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Application number
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95912062.7
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Title of the application
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Improved processibility and lacing resistance when silanized
pigments are incorporated in polymers
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Applicant name
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E.I. DU PONT DE NEMOURS AND COMPANY
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Opponent name
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KRONOS INTERNATIONAL, INC.
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Keywords
Inventive step (main request; auxiliary requests 1 to 3): no -
hint in the prior art to improve dispersibility
Inventive step (auxiliary request 4): yes - adding silanes to
polydimethylsiloxane for silanizing titanium dioxide not
derivable form prior art; effect proven
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