Granted Patent
Utility
US 6,676,486 · App. 09/909,603
Polymeric chemical injection into a water jet to improve cut quality while cutting very brittle materials
Inventor:
David J. Quirke
Patented Case
View Patent ↗
Granted: Jan 13, 2004
Filed: Jul 20, 2001
Inventor
David J. Quirke
Assignee (at issue)
LIGHTWAVE MICROSYSTEMS, INC.
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.