Granted Patent
Utility
US 5,399,693 · App. 07/469,819
Substituted piperazine-2-carboxylic acids and derivatives thereof
Inventors:
Jeffrey C. Watkins, Arwel W. Jones
Patented Case
View Patent ↗
Granted: Mar 21, 1995
Filed: Jan 23, 1990
Inventors
Jeffrey C. Watkins
Arwel W. Jones
Assignee (at issue)
British Technology Group Limited
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.