Granted Patent
Utility
US 5,319,074 · App. 07/825,239
Bifunctional reactive dyestuffs containing vinylsulphone or alkylsulphone groups and a 2,4 difluoro pyrimidine group
Inventors:
Wolfram Reddig, Karl-Josef Herd, Ernst Kysela
Patented Case
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Granted: Jun 7, 1994
Filed: Jan 24, 1992
Inventors
Wolfram Reddig
Karl-Josef Herd
Ernst Kysela
Assignee (at issue)
Bayer Aktiengesellschaft
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.