Granted Patent
Utility
US 5,206,280 · App. 07/666,898
Laser markable white pigment composition
Inventor:
Stewart Wynn Williams
Patented Case
View Patent ↗
Granted: Apr 27, 1993
Filed: Mar 8, 1991
Inventor
Stewart Wynn Williams
Assignee (at issue)
British Aerospace Public Limited Co.
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.