IP Library › Granted Patent US 5,501,978
Granted Patent Utility
US 5,501,978 · App. 08/252,467

Aeration drum for composting toilet

Inventor: Henric Sundberg
Patented Case View Patent ↗
Granted: Mar 26, 1996 Filed: Jun 1, 1994
Inventor
Henric Sundberg

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 5,501,978
App. No.
08/252,467
Filed
1994-06-01
Granted
1996-03-26
Kind
A