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Dean Dewulf
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Austin, TX, US
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last 30 patents
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Patent Grant
Cleaning solutions and etchants and methods for using same
Patent number
7,192,910
Issue date
Mar 20, 2007
Sachem, Inc.
William A. Wojtczak
C11 - ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES FATTY ACIDS...
Patents Applications
last 30 patents
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Patent Application
Selective wet etching of metal nitrides
Publication number
20060226122
Publication date
Oct 12, 2006
William A. Wojtczak
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
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Patent Application
Cleaning solutions and etchants and methods for using same
Publication number
20050143270
Publication date
Jun 30, 2005
Sachem, Inc.
William A. Wojtczak
H01 - BASIC ELECTRIC ELEMENTS