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. 05, 2006
Filed:
Jan. 23, 2004
Takehito Yoshida, Kawasaki, JP;
Nobuyasu Suzuki, Kawasaki, JP;
Toshiharu Makino, Kawasaki, JP;
Yuka Yamada, Kawasaki, JP;
Takehito Yoshida, Kawasaki, JP;
Nobuyasu Suzuki, Kawasaki, JP;
Toshiharu Makino, Kawasaki, JP;
Yuka Yamada, Kawasaki, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A particle counter counts particles in aerosol having a particle size of from 2 nm to 50 nm in an operating pressure range from an atmospheric pressure through a reduced pressure to a low vacuum and calculate a particle size distribution. The particle counter charges particles in the aerosol and applies an electrostatic field thereto, and mixes the aerosol with a non-charged sheath gas flow shaped like a laminar flow whereby the respective particles separate into traces depending on their particle size where they can be counted. Further, by using an electron multiplier for exciting cluster ions to detect the charged particles and operating it as a high-pass filter, even if the number density of the particles is small, it is possible to effectively count the particles.