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:
Sep. 11, 2001
Filed:
Feb. 22, 1999
Applicant:
Inventors:
Peter L. Zaleski, Willow Springs, IL (US);
David J. Derwin, Des Plaines, IL (US);
Richard J. Girkant, Lansing, IL (US);
Assignee:
Superior Graphite Co., Chicago, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
B32B 5/16 ; C01B 3/104 ;
U.S. Cl.
CPC ...
B32B 5/16 ; C01B 3/104 ;
Abstract
A method for making expanded graphite from lamellar flake graphite comprising first providing lamellar flake graphite particles having at least a minimal purity, then intercalating the lamellar flake graphite particles with an expandable graphite intercalation compound, followed by expanding the graphite intercalation compound to exfoliate the flake graphite particles, and finally air milling the exfoliated flake graphite particles to further delaminate them.