Measuring and testing – Liquid analysis or analysis of the suspension of solids in a... – Viscosity
Reexamination Certificate
2007-11-06
2007-11-06
Cygan, Michael (Department: 2855)
Measuring and testing
Liquid analysis or analysis of the suspension of solids in a...
Viscosity
C073S054160, C073S054430, C073S054390
Reexamination Certificate
active
11078015
ABSTRACT:
An improved micro slit viscometer includes a combined micrometer depth rectangular slit flow channel with monolithically integrated multiple pressure sensors in the flow channels and a pumping system that injects a test sample to the channel at a desired flow rate. Pressure sensing diaphragm of the monolithically integrated pressure sensors is smooth to minimize the flow disturbance thereby measuring accurate local pressures. With the measurement of the pressures at various locations of the channel the true viscosity of test sample can be calculated. The viscometer may consist of multiple flow channels and thus the true viscosity at multiple shear rates can be measured simultaneously for a given flow rate thereby obtaining a full viscosity curve as a function of shear rate of non-Newtonian liquids in a much faster manner. The viscometer needs only a miniscule amount of sample, which minimizes a waste of test material. The flow channels and the monolithically integrated pressure sensors are fabricated using microfabriaction processes on wafers and combined, which greatly reduce the production costs.
REFERENCES:
patent: 4241602 (1980-12-01), Han et al.
patent: 4624132 (1986-11-01), Parnaby et al.
patent: 5029479 (1991-07-01), Bryan
patent: 5058435 (1991-10-01), Terry et al.
patent: 5202939 (1993-04-01), Belleville et al.
patent: 5225959 (1993-07-01), Stearns
patent: 5392117 (1995-02-01), Belleville et al.
patent: 5485753 (1996-01-01), Burns et al.
patent: 5663503 (1997-09-01), Dam et al.
patent: 5983727 (1999-11-01), Wellman et al.
patent: 6062088 (2000-05-01), Ingrisch et al.
patent: 6078706 (2000-06-01), Nau et al.
patent: 6085596 (2000-07-01), Jensen et al.
patent: 6725725 (2004-04-01), Werner et al.
patent: 6892583 (2005-05-01), Baek
Dziuban, J.A. et al.; “Silicon optical pressure sensor”; Sensors and Actuators A (Physical); Apr. 1992, pp. 628-631; vol. A32, No. 1-3; Switzerland.
Wagner, C. et al.; “Optical pressure sensor based on a Mach-Zehdner Interferometer integrated with a lateral a-Si:H p-i-n photodiode”; IEEE Photonics Technology Letters; Oct. 1993, pp. 1257-1259; vol. 5, No. 10; USA.
Chan M.A. et al.; “A micromachined pressure sensor with fiber-optic interferometric readout”; Sensors and Actuators A (Physical); May 1994, pp. 196-201; vol. A42, No. 1-3; Switzerland.
Lee, S.B. et al.; “A micromachined interferometer for dynamic high-pressure sensing (in automotive applications)”; Sensors; Jun. 1996, pp. 31-32 and 35-36; vol. 13, No. 6; Helmers Publishing, USA.
FISO Technologies; “Product Data Sheet, FOP-M In-Vivo Pressure Sensor”, 2 pages.
FISO Technologies; “Technical Note Series, Fiber-Optic Pressure Transducer”, 4 pages.
Cygan Michael
Rheosense, Inc.
Thorpe North & Western LLP
LandOfFree
Micro slit viscometer with monolithically integrated... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Micro slit viscometer with monolithically integrated..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Micro slit viscometer with monolithically integrated... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3851403