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:
Nov. 07, 2023
Filed:
Jun. 16, 2021
Sigma-aldrich Co. Llc, St. Louis, MO (US);
William R. Betz, State College, PA (US);
Michael J. Keeler, Bellefonte, PA (US);
Curtis W. Frantz, State College, PA (US);
Jay M. Jones, Bellefonte, PA (US);
William Maule, Altoona, PA (US);
Kenneth G. Espenschied, Spring Mills, PA (US);
Cory E. Muraco, State College, PA (US);
Clinton Corman, State College, PA (US);
Maochun Ye, Bellefonte, PA (US);
Sigma-Aldrich Co. LLC, St. Louis, MO (US);
Abstract
Methods for producing porous graphic carbon microspheres having improved separation properties over conventional porous graphitic carbons. The methods include dispersing a monovinyl aromatic monomer, a polyvinyl aromatic monomer, and an initiator in a solvent, contacting porous silica microspheres with the monomer dispersion for a time sufficient for the monomers to coat the porous silica microspheres, polymerizing the monomers to form copolymer coated microspheres, sulfonating the copolymer, pyrolyzing the sulfonated copolymer, digesting the carbon microspheres to dissolve the silica leaving porous carbon microspheres, pyrolyzing the porous carbon microspheres, and graphitizing the porous carbon microspheres to form porous graphitic carbon microspheres. Further provided are improved porous graphitic carbon microspheres and chromatography columns including the improved porous graphitic carbon microspheres described herein.