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:
Dec. 11, 2007
Filed:
Jun. 22, 2006
Masaru Nakano, Saitama, JP;
Masaru Nakano, Saitama, JP;
Mahle Filter Systems Japan Corporation, Tokyo, JP;
Abstract
An activated carbon adsorbing and desorbing evaporative fuel has pores formed therein with the following rates: a rate of a pore whose pore diameter is smaller than or equal to 20 Å in which butane is apt to remain with respect to a pore whose pore diameter is smaller than or equal to 100 Å is less than or equal to 20%, and a rate of a pore whose pore diameter is greater than 20 Å and smaller than or equal to 25 Å that is effective in adsorbing low boiling point gas components with respect to the pore whose pore diameter is smaller than or equal to 100 Å is between 15 and 25%. An evaporative fuel treatment apparatus has a filling chamber filled with the activated carbon as an adsorbent.