IP Library › Granted Patent US 4,902,270
Granted Patent Utility
US 4,902,270 · App. 07/251,855

Centrifuge tube

Inventors: Paul V. Comeau, Richard A. Leoncavallo
Patented Case View Patent ↗
Granted: Feb 20, 1990 Filed: Oct 3, 1988
Inventors
Paul V. Comeau
Richard A. Leoncavallo
Assignee (at issue)
Nalge Company

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 4,902,270
App. No.
07/251,855
Filed
1988-10-03
Granted
1990-02-20
Kind
A