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:
Feb. 11, 2003
Filed:
Feb. 16, 2001
Applicant:
Inventors:
Ronald E. Sager, Carlsbad, CA (US);
Michael B. Simmonds, Mammoth Lakes, CA (US);
Jost H. Diederichs, Poway, CA (US);
Kurt G. Jensen, Poway, CA (US);
Randall C. Black, San Diego, CA (US);
Assignee:
Quantum Design, Inc., San Diego, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 2/774 ; G01N 1/506 ; G01N 3/3553 ;
U.S. Cl.
CPC ...
G01N 2/774 ; G01N 1/506 ; G01N 3/3553 ;
Abstract
Apparatus for detection and measurement of agglutinations of magnetic particles employing Hall sensors. A low frequency AC signal is employed to excite or bias the Hall sensors which reside in a DC magnetic field. The particles are moved into operative relationship with the Hall sensors in order to generate a signal representing the number of particles on the substrate. The method for such detection and measurement is also part of the invention.