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Catherine T. Chang
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Wilmington, DE, US
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last 30 patents
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Patent Grant
Positive-working photosensitive electrostatic master with improved...
Patent number
5,145,760
Issue date
Sep 8, 1992
E. I. Du Pont de Nemours and Company
Graciela B. Blanchet-Fincher
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Positive-working photosensitive electrostatic master
Patent number
5,120,629
Issue date
Jun 9, 1992
E. I. Du Pont de Nemours and Company
Richard D. Bauer
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Photohardenable electrostatic element with improved environmental l...
Patent number
5,064,740
Issue date
Nov 12, 1991
E. I. Du Pont de Nemours and Company
Graciela B. Blanchet-Fincher
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Inhibitor-containing photohardenable electrostatic master compositi...
Patent number
5,043,237
Issue date
Aug 27, 1991
E. I. Du Pont de Nemours and Company
Graciela B. Blanchet-Fincher
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Photohardenable electrostatic element with improved backtransfer ch...
Patent number
5,028,503
Issue date
Jul 2, 1991
E. I. Du Pont de Nemours and Company
Catherine T. Chang
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Photohardenable electrostatic element with improved environmental l...
Patent number
5,006,434
Issue date
Apr 9, 1991
E. I. Du Pont de Nemours and Company
Graciela B. Blanchet-Fincher
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Silver-based electrostatic printing master
Patent number
4,913,998
Issue date
Apr 3, 1990
E. I. Du Pont de Nemours and Company
Allan Cairncross
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY