Chromatography column closure or similar article

- Cerex Corporation


FIG. 1 is a bottom perspective view of a chromatography column closure or similar article showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a side elevational view thereof; and

FIG. 4 is a top plan view thereof.

Referenced Cited

U.S. Patent Documents

4582608 April 15, 1986 Ritacco
4737292 April 12, 1988 Ritacco et al.

Patent History

Patent number: D309498
Type: Grant
Filed: Aug 20, 1987
Date of Patent: Jul 24, 1990
Assignee: Cerex Corporation (Gaithersburg, MD)
Inventor: Arthur E. Colvin, Jr. (Mount Airy, MD)
Primary Examiner: A. Hugo Words
Assistant Examiner: Stella M. Reid
Attorney: Michael W. York
Application Number: 7/87,908


Current U.S. Class: D24/8