The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 10, 1979
Filed:
Aug. 22, 1977
Joseph J Kirkland, Wilmington, DE (US);
Wallace W Yau, Newark, DE (US);
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
Disclosed herein is a resolving zone for a chromatograph comprising a plurality of porous, silica macroparticles chosen to provide the resolving zone with a bimodal pore distribution, the average pore size for each mode being such that the linear portions of the molecular weight calibration curve for each pore size in the bimodal distribution are nonoverlapping and the pore volume of each mode being such that the aforesaid linear portions are substantially parallel. The macroparticles can be either totally or superficially porous. The resolving zone can be composed of either a plurality of macroparticles each having a bimodal pore distribution or a plurality of macroparticles having one pore size distribution and a plurality of macroparticles having another pore distribution.