Alan Scott Greenberg
Land Surveyors at Wintercress Ln, Boulder, CO

2013023, Sep 12, 2013

Jul 12, 2011

13/809780

Alan R. Greenberg - Boulder CO, US
Jack Gilron - Beer Sheva, IL
Keith D. Cobry - Lafayette CO, US
Elmira Kujundzic - Erie CO, US
Xiao Yun Lu - Longmont CO, US
Guy Mizrahi - Beer Sheva, IL
Michael Peterson - Orono ME, US

THE REGENTS OF THE UNIVERSITY OF COLORADO, A BODY CORPORATION - Denver CO
BEN-GURION UNIVERSITY OF THE NEGEV RESEARCH AND DEVELOPMENT AUTHORITY - Beer-Sheva

G01N 29/02

700266, 702 25

A method of early detection of scaling on internal surfaces of conduits of water processing equipment, is provided herein. The method includes: transmitting ultrasonic signals through the wall of the conduits; deriving data samples from received ultrasonic signals or reflections thereof; calculating a moving average of the scatter of the ultrasonic signals, over time, based on the data samples; applying a statistical operand to the moving average, to yield a statistical distribution metric; determining a dynamic window defined by: (i) an upper boundary being the moving average plus at least a fraction of the statistical distribution metric and (ii) a lower boundary being the moving average minus the at least a fraction of the statistical distribution metric; generating a trend line being a smooth fitting of the derived samples; and monitoring the trend line within the window to detect a crossover of the trend line at either of the boundaries.

6479007, Nov 12, 2002

Jun 16, 2000

09/595213

Alan R. Greenberg - Boulder CO
William B. Krantz - Cincinnati OH
Andrew E. Neice - Thornton CO
Paul W. Todd - Greenville IN

University Technology Corporation - Boulder CO

B29C 3508

264413, 264 41, 264216, 264425, 4251748 E, 425224

An apparatus and method for controlling the pore structure of thin polymeric sheets, such as porous membranes and thin films, during solvent casting or interfacial polymerization. The invention may be used to reduce or eliminate macrovoid pore defects from solvent-cast or interfacially polymerized polymeric membranes used in a variety of separations or controlled release tasks or to create a desired pore structure in porous thin films, such as may be used in breathable garments, surgical dressings, and screen printing. A nonuniform electric field is generated at one or more locations in proximity to a liquid film in which a desired pore structure is to be formed. Due to the difference in dielectric constant between the liquid within the pores and that in the surrounding liquid, the electric field causes an attractive or repulsive force on the evolving pores.

6161435, Dec 19, 2000

Jul 21, 1999

9/358733

Leonard J. Bond - Richmond WA
Guo Yong Chai - Boulder CO
Alan Richard Greenberg - Boulder CO
William Bernard Krantz - Boulder CO

University Technology Corporation - Boulder CO

G01D 700, B01D 1706, B01D 3300

73587

The fouling state of a polymeric membrane within the high pressure housing of a spiral wound or a hollow fiber membrane module is determined. An ultra sonic transducer positioned with its emitting face in physical engagement with the outer surface of the housing is pulse energized by a pulser/receiver device. A membrane echo signal is detected by a receiver of the pulser/receiver device. A reference echo signal indicative of a fouled or an unfouled state of the membrane is compared to the echo signal to determine the membrane fouling state. The echo to reference comparing step can be based upon comparing amplitude domain signals, comparing time-domain signals, comparing combinations of amplitude domain and time-domain signals, and comparing transformations of amplitude domain and time-domain signals. A clean or a fouled reference echo can be provided from a clean or a fouled membrane and then stored for use during a liquid separation process, or a clean reference echo signal can be obtained on-line from a second transducer whose echo signal is derived from an area of the membrane known to remain relatively unfouled during the liquid separation process, or a clean or fouled reference echo signal can be provided for later use during a cleaning process or during a liquid separation process. Multiple transducers and a switching network can sample the fouling state at different positions within the membrane module.

2013004, Feb 21, 2013

May 2, 2011

13/695251

Alan R. Greenberg - Boulder CO, US
William B. Krantz - Boulder CO, US
Elmira Kujundzic - Erie CO, US
Adrian Yeo - Singapore, SG
Seyed Saeid Hosseini - Singapore, SG

NATIONAL UNIVERSITY OF SINGAPORE - Singapore

G01N 15/08

73 38

A method for determination of pore-size distribution in a porous material called evapo porometry (EP) is capable of determining pore sizes from approximately the nanometer scale up to the micron scale. EP determines the pore size based on the evaporative mass loss at constant temperature from porous materials that have been pre-saturated with either a wetting or non-wetting volatile liquid. The saturated porous material is placed in an appropriate test cell on a conventional microbalance to measure liquid mass loss at a constant temperature as a function of time. The mass-loss rate is then related to the pore-size distribution. The microbalance permits measuring the mass as a function of time. The slope of the mass versus time curve is the evaporation rate. The evaporation rate is related to the vapor pressure at the interface between the liquid in the porous material and the ambient gas phase. The vapor pressure in turn is related to the pore diameter.

6959602, Nov 1, 2005

Mar 12, 2003

10/388386

Anthony DiLeo - Westford MA, US
Zong Mu Wang - Old Town ME, US
Alan Greenberg - Boulder CO, US

Millipore Corporation - Billerica MA

G01N029/00

73602, 73597

Plate waves are used to determine the presence of defects within a porous medium, such as a membrane. An acoustic wave can be propagated through a porous medium to create a plate wave within the medium. The plate wave creates fast compression waves and slow compression waves within the medium that relate to the material and structural properties of the medium. The fast compression wave provides information about the total porosity of a medium. While the slow compression wave provides information about the presence of defects in the medium or the types of materials that form the medium.