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. 19, 2016
Filed:
Mar. 28, 2007
Zhaohua Luan, Midlothian, VA (US);
Diane L. Gee, Richmond, VA (US);
Georgios Karles, Richmond, VA (US);
Ila Skinner, Chester, VA (US);
Jose Nepomuceno, Richmond, VA (US);
Zhaohua Luan, Midlothian, VA (US);
Diane L. Gee, Richmond, VA (US);
Georgios Karles, Richmond, VA (US);
Ila Skinner, Chester, VA (US);
Jose Nepomuceno, Richmond, VA (US);
Philip Morris USA Inc., Richmond, VA (US);
Abstract
A process for making modified activated carbon from an activated carbon substrate. The activated carbon substrate is pre-treated to make an exposed surface of the activated carbon substrate substantially hydrophilic, coated with a carbon precursor to form a coated activated carbon, and then the coated activated carbon substrate is heated to carbonize the carbon precursor to from the modified activated carbon. The modified activated carbon comprises a uniform porous carbon membrane formed on an exposed surface of the activated carbon substrate. The carbon membrane can mediate the absorption and/or adsorption kinetics of the activated carbon substrate. The modified activated carbon, which can be incorporated into one or more components of a cigarette, can selectively remove gaseous constituents from mainstream smoke during smoking.