IP Library › Granted Patent US 6,148,578
Granted Patent Utility
US 6,148,578 · App. 09/099,002

Slate and interlayment roof and a method of preparing the same

Inventors: David Nowacek, James J. Nowacek
Patented Case View Patent ↗
Granted: Nov 21, 2000 Filed: Jun 17, 1998
Inventors
David Nowacek
James J. Nowacek

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.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 6,148,578
App. No.
09/099,002
Filed
1998-06-17
Granted
2000-11-21
Kind
A