IP Library › Granted Patent US 5,252,111
Granted Patent Utility
US 5,252,111 · App. 07/937,699

Expandable multi-ply obliquely oriented honeycomb filter media

Inventors: Victor V. Spencer, deceased, by Mary Spencer, executrix, Leonid A. Bagrin
Patented Case View Patent ↗
Granted: Oct 12, 1993 Filed: Sep 1, 1992
Inventors
Victor V. Spencer, deceased
by Mary Spencer, executrix
Leonid A. Bagrin

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 5,252,111
App. No.
07/937,699
Filed
1992-09-01
Granted
1993-10-12
Kind
A