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:
Mar. 26, 2019
Filed:
Jul. 22, 2015
Applicant:
International Business Machines Corporation, Armonk, NY (US);
Inventors:
Levi A. Campbell, Poughkeepsie, NY (US);
Prabjit Singh, Poughkeepsie, NY (US);
Jing Zhang, Poughkeesie, NY (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 15/06 (2006.01); G01N 27/12 (2006.01); G01N 15/00 (2006.01);
U.S. Cl.
CPC ...
G01N 15/0656 (2013.01); G01N 15/00 (2013.01);
Abstract
A method includes measuring a leakage current through a particulate matter sample in a humidity chamber, the leakage current is measured as a relative humidity in the humidity chamber is incrementally increased, and plotting a logarithm of the measured leakage current as a function of the relative humidity. The plot of the logarithm of the measured leakage current as a function of the relative humidity has an inversion region, a low relative humidity region, and a high relative humidity region.