Eun Kim

US Patent:

20120108420, May 3, 2012

Filed:

Oct 21, 2011

Appl. No.:

13/317555

Inventors:

Richard G. Luthy - Stanford CA, US
Eun Ah Kim - Menlo Park CA, US

International Classification:

B01J 20/26

US Classification:

502402

Abstract:

A toxin immobilization particle and method of fabrication is provided that includes a polysulfide-rubber polymer coated activated carbon particle that provides enhanced toxin adsorption. A porous activated carbon particle have a size range up to 2 mm is used. The polysulfide-rubber polymer coated activated carbon particle includes a polymer-dose range of up to 1.64 grams of sulfur per gram of activated carbon particles, where the toxins can include mercury, PCBs, chlorinated pesticides or polycyclic aromatic hydrocarbons. The method of forming the toxin immobilization particle includes condensing a polymer in a sulfide mixture to form a polysulfide-rubber polymer compound and coating an activated carbon particle with the polysulfide-rubber polymer. The levels of sulfur loading in the toxin immobilization particles are controlled by the polymer dose during the coating process, where the polysulfide polymer coated activated carbon particle provides enhanced toxin adsorption.

US Patent:

48161250, Mar 28, 1989

Filed:

Aug 19, 1988

Appl. No.:

7/217826

Inventors:

Richard S. Muller - Kensington CA
Eun S. Kim - Berkeley CA

Assignee:

The Regents of The University of California - Berkeley CA

International Classification:

C23C 1434
H04R 3100

US Classification:

20419218

Abstract:

A miniature diaphragm pressure transducer. A thin diaphragm of silicon nitride has an upper face covered by a zinc-oxide piezoelectric film encapsulated in chemical vapor deposited silicon dioxide. A series of annular, basically conentric, polysilicon electrodes are provided in the silicon dioxide between the piezoelectric film and the diaphragm and in contact with the piezoelectric film. A series of annular, basically concentric, aluminum electrodes are on the opposite side of the piezoelectric film from the polysilicon electrodes and are aligned with the polysilicon electrodes; they lie over the silicon dioxide, and are in contact with the piezoelectric film.

US Patent:

47838213, Nov 8, 1988

Filed:

Nov 25, 1987

Appl. No.:

7/125375

Inventors:

Richard S. Muller - Kensington CA
Eun S. Kim - Berkeley CA

Assignee:

The Regents of The University of California - Berkeley CA

International Classification:

H04R 1700
H04R 704
H04R 1900

US Classification:

381173

Abstract:

A miniature diaphragm pressure transducer. A thin diaphragm of silicon nitride has an upper face covered by a zinc-oxide piezoelectric film encapsulated in chemical vapor deposited silicon dioxide. A series of annular, basically concentric, polysilicon electrodes are provided in the silicon dioxide between the piezoelectric film and the diaphragm and in contact with the piezoelectric film. A series of annular, basically concentric, aluminum electrodes are on the opposite side of the piezoelectric film from the polysilicon electrodes and are aligned with the polysilicon electrodes; they lie over the silicon dioxide, and are in contact with the piezoelectric film.