Lei Zhou, Age 542540 N Moreland Blvd APT 401, Cleveland, OH 44120

6740254, May 25, 2004

Dec 9, 2002

10/314917

Lei Zhou - Copley OH
George Schaefer - Strongsville OH

Ferro Corporation - Cleveland OH

C09K 300

25218224, 25218213, 560 8, 560 55, 560124, 560174, 560189

The present invention provides a phthalate-free plasticizer for polymer resins. The phthalate-free plasticizer according to the invention includes a mixture of different triesters of glycerin, at least one of which meets the formula: wherein at least two of R , R , and R are different alkyl or aryl groups. Phthalate-free plasticizers according to the invention can be made by esterifying glycerin with a mixture of acids in the presence of a catalyst. In the presently most preferred embodiment of the invention, the mixture of acids includes benzoic acid and butanoic acid. The plasticizer according to the invention can be used to modify the properties of a wide variety of polymers including vinyl polymers, rubbers, polyurethanes, and acrylics, and has superb thermostability and low volatility.

6811722, Nov 2, 2004

Oct 10, 2003

10/683479

Lei Zhou - Copley OH
George Schaefer - Strongsville OH
William W. Knickmeyer - late of St. Louis MO
David Paul - St. Louis MO

Ferro Corporation - Cleveland OH

C09K 300

25218224, 25218213, 560 8, 560 55, 560179, 560189

The present invention provides a phthalate-free plasticizer for polymer resins. The phthalate-free plasticizer according to the invention includes a mixture of different triesters of glycerin, at least one of which meets the formula: wherein at least two of R , R , and R are different alkyl or aryl groups. Phthalate-free plasticizers according to the invention can be made by esterifying glycerin with a mixture of acids in the presence of a catalyst. Preferably, the mixture of acids includes at least two selected from the group consisting of alkyl acids and aryl acids, with each acid in the mixture containing up to about 11 carbon atoms, and more preferably from about 4 to about 9 carbon atoms each. The plasticizer according to the invention can be used to modify the properties of a wide variety of polymers including vinyl polymers, rubbers, polyurethanes, and acrylics, and has superb thermostability and low volatility.

7792513, Sep 7, 2010

Sep 19, 2007

11/857696

Aminghasem Safarian - Irvine CA, US
Lei Zhou - Irvine CA, US
Payam Heydari - Irvine CA, US

The Regents of the University of California - Oakland CA

H04B 1/16

455296, 455323, 455325

Described herein are ultra wide-band distributed RF (UWB-DRF) front-end receivers comprising composite cells distributed along transmission lines, where each composite cell comprises a low-noise amplifier (LNA) merged with a mixer. By merging the LNA and the mixer in each composite cell, the power consumption and chip area of the RF front-end is reduced. Further, the distributed architecture of the RF front-end allows it to operate over a wide bandwidth by absorbing the parasitic capacitances of the composite cells into the transmission lines of the RF-front end. Embodiments of the RF front-end provide wideband flat gain, low noise figure (NF), wideband linearity, and wideband matching at the inputs of the RF front-end. In an embodiment, a programmable resistance at the termination of the RF transmission line allows the RF front-end to trade off a few decibels of mismatch at the RF input for higher gain and lower NF.

8112056, Feb 7, 2012

Jul 25, 2008

12/180251

Aminghasem Safarian - Tustin CA, US
Lei Zhou - Irvine CA, US
Payam Heydari - Irvine CA, US

The Regents of The University of California - Oakland CA

H04B 1/10
H04B 1/26

455296, 455323, 455325

A novel DDCR RF front-end for use in UWB applications combining a distributed approach which provides wideband functionality of the RF front-end with I-Q requirement of DCRs. The distributed architecture uses composite cells of a merged LNA and mixer along the input RF T-line.

2003011, Jun 26, 2003

Dec 20, 2001

10/027810

Lei Zhou - Copley OH, US
George Schaefer - Strongsville OH, US
William Knickmeyer - St. Louis MO, US
Pamela Knickmeyer - St. Louis MO, US
David Paul - St. Louis MO, US

C09K003/00
C08K005/09

252/182110, 252/182130, 524/306000

The present invention provides a phthalate-free plasticizer for polymer resins. The phthalate-free plasticizer according to the invention includes a mixture of different triesters of glycerin, at least one of which meets the formula: wherein at least two of R, R, and Rare different alkyl or aryl groups. Phthalate-free plasticizers according to the invention can be made by esterifying glycerin with a mixture of acids in the presence of a catalyst. Preferably, the mixture of acids includes at least two selected from the group consisting of alkyl acids and aryl acids, with each acid in the mixture containing up to about 11 carbon atoms, and more preferably from about 4 to about 9 carbon atoms each. The plasticizer according to the invention can be used to modify the properties of a wide variety of polymers including vinyl polymers, rubbers, polyurethanes, and acrylics, and has superb thermostability and low volatility.