Granted Patent
Utility
US 6,235,372 · App. 09/325,820
Color stable pigment for granular surface coated roofing and siding shingles
Inventor:
Ingo B. Joedicke
Patented Case
View Patent ↗
Granted: May 22, 2001
Filed: Jun 4, 1999
Inventor
Ingo B. Joedicke
Assignee (at issue)
ISP INVESTMENTS LLC
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.