IP Library › Granted Patent US 5,326,512
Granted Patent Utility
US 5,326,512 · App. 07/991,805

Porous ceramic filter and preparation thereof

Inventors: Thomas L. Stillwagon, Douglas J. Twait
Patented Case View Patent ↗
Granted: Jul 5, 1994 Filed: Dec 16, 1992
Inventors
Thomas L. Stillwagon
Douglas J. Twait
Assignee (at issue)
AlliedSignal, Inc.

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 5,326,512
App. No.
07/991,805
Filed
1992-12-16
Granted
1994-07-05
Kind
A