Electrolysis: processes – compositions used therein – and methods – Electrolytic analysis or testing – For ph
Reexamination Certificate
2007-07-11
2010-10-26
Neckel, Alexa D (Department: 1795)
Electrolysis: processes, compositions used therein, and methods
Electrolytic analysis or testing
For ph
C204S433000, C073S001020
Reexamination Certificate
active
07820029
ABSTRACT:
A system of measuring pH of a solution having a calibration device to counteract time-drift effect. The calibration device of the system adjusts a compensation voltage to zero a measuring voltage of a first sensor and only respond to time-drift voltage of the first sensor. The calibration device has a differential operation amplifier receiving measuring voltages from the first sensor and a second sensor of the system to eliminate the time-drift voltages of the first and second sensors, thereby achieving calibration of the time-drift effects.
REFERENCES:
patent: 4657658 (1987-04-01), Sibbald
patent: 4691167 (1987-09-01), Vlekkert et al.
patent: 4879517 (1989-11-01), Connery et al.
patent: 5130265 (1992-07-01), Battilotti et al.
patent: 5309085 (1994-05-01), Sohn
patent: 6617190 (2003-09-01), Chou et al.
patent: 2002/0006632 (2002-01-01), Ponnampalam et al.
patent: 2002/0180609 (2002-12-01), Ding et al.
patent: 2003/0054177 (2003-03-01), Jin
patent: 2003/0093011 (2003-05-01), Jalisi
patent: 2004/0075578 (2004-04-01), Dudda et al.
patent: 2005/0218976 (2005-10-01), Haraguchi et al.
patent: 2007/0138028 (2007-06-01), Chodavarapu et al.
patent: WO 2004/093311 (2004-10-01), None
Hong, Institute of Electronic Engineering National Yunlin University of Science and Technology, Master Thesis, pp. 1-160, 2004.
Ng., p. 520, Complete Guide to Semiconductor Devices, McGraw-Hill Inc. 1995.
Cane et al., Microtechnologies for pH ISFET chemical sensors, Microelectronics Journal 28, 1997, 389-405.
Wadika et al., PH Sensitive ISFETS Based on Titanium Nitride and Their Application to Battery Monitor, Proc. Transducers 91, San Francisco, CA, May 1991, pp. 222-224.
Chou Jung-Chuan
Liu Cheng-Hsin
Dieterle Jennifer
Muncy Geissler Olds & Lowe, PLLC
National Yunlin University of Science and Technology
Neckel Alexa D
LandOfFree
pH measurement system and method for reducing time-drift... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with pH measurement system and method for reducing time-drift..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and pH measurement system and method for reducing time-drift... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4173498