Granted Patent
Utility
US 6,214,466 · App. 09/362,797
Algae-resistant roofing granules
Inventor:
Ingo B. Joedicke
Patented Case
View Patent ↗
Granted: Apr 10, 2001
Filed: Jul 28, 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.