Joseph B Culkin, Age 69Seattle, WA

7944146, May 17, 2011

Jul 13, 2007

12/373405

Hyo-Soo Jeong - Seoul, KR
Kristopher Warren Keller - Danville CA, US
Joseph Bradley Culkin - Danville CA, US

Photegra Corporation - Emeryville CA

H01J 31/50

313530, 438 20

The photocathode lighting device of planar light emission including: a light source unit emitting a first light; a cathode plate contacted face-to-face with the light source unit; a metal mask layer adhered to the cathode plate and including a repetitive plurality of apertures; a photocathode formed on a surface of the metal mask layer, receiving the first light, and emitting an electron; an anode plate facing the cathode plate and spaced apart from the cathode plate; and a phosphor formed in a lower part of the anode plate and emitting a second light when the emitted electron collides with the phosphor.

2012031, Dec 13, 2012

Jun 10, 2011

13/134572

Joseph Bradley Culkin - Emeryville CA, US

B01D 9/00

23295 R, 4222451

A solute crystallizing apparatus utilizing a solution having solute and a first solvent. A mixing unit for combining the solution and a second solvent which lowers the solubility of the solute. A pump receives the mixed solute, first solvent and second solvent and outputs the same under a positive pressure. A membrane separator, having a membrane, receives the pressured solute, first solvent and second solvent mixture and produces a slurry of crystals of the solute, the first solvent, and second solvent as the concentrate or retentate. A solution of the solute, the first solvent and second solvent passes through the membrane as permeate. The concentration of the solute in the retentate is greater than the concentration of solute in the permeate.

5080770, Jan 14, 1992

Sep 11, 1989

7/405658

Joseph B. Culkin - Oakland CA

G01N 2726

2041823

A method and apparatus for separating particles mixed with liquid utilizing a container for holding the same. The system also employs at least one separation membrane, which is permeable to the heterogeneous particles mixed with the liquid, divides the container into first and second separation chambers. A pump biases the flow of the particle liquid mixture from one side of the membrane to the other. Simultaneously, an electric field or potential is applied to the particle liquid mixture to bias flow of the same in the other direction.

6275270, Aug 14, 2001

Aug 5, 1996

8/692455

Joseph Bradley Culkin - Emeryville CA

Calvest Associates, Inc. - Stateline NV

H04N 574

348739

A video display system utilizing a video source and an image intensifier having a substrate. A video image source positions at the substrate to provide a photon signal. A photocathode element at the substrate converts the photon signal into electrons. An optically transparent body having first and second surfaces is placed opposite the substrate spaced therefrom. A vacuum chamber is formed between the substrate and the first surface of the second optically transparent body. A fluorescing layer is positioned on said first surface of the second optically transparent body. A source of electrical power provides a voltage potential between the photocathode layer and said fluorescing layer. The intensified video image exits the second surface of the second optically transparent body for viewing.

5725767, Mar 10, 1998

Sep 14, 1996

8/706275

Joseph Bradley Culkin - Emeryville CA

Calvest Associates, Inc. - Stateline NV

B01D 6300
B01D 2432

21032175

A filter cartridge for separation of aqueous colloidal suspensions utilizing a shell which forms a chamber having a colloidal suspension inlet and outlets for permeate and concentrate streams. A core is placed within the shell and includes a plurality of filter elements which are located in overlying relationship with one another. Each filter element possesses a relative rigid backing member and a filter membrane. The core is fastened to the shell by connecting a plurality of the backing members to the body of the core.

5014564, May 14, 1991

Mar 27, 1990

7/500061

Joseph B. Culkin - Emeryville CA

Calvest Associates - Las Vegas NV

B06B 116

74 61

A drive mechanism for a body utilizing a motor which rotates a shaft. An eccentric weight is mounted on the shaft for movement with the same. The eccentric weight is linked to a base weight and transmits an oscillational motion along a dimension of the base weight. A torsion spring fixed to the counter weight extends away from the base weight and connects to the body to impart an oscillational torsional motion thereto.

4872988, Oct 10, 1989

Feb 2, 1988

7/151359

Joseph B. Culkin - Alameda CA

B01D 1300

210636

Particulates are separated from colloidal suspensions by filtration where the filter is oscillated relative to the suspension in order to inhibit plugging of the filter. Plugging is substantially eliminated and filtration rates greatly enhanced by oscillating the membrane at a sufficiently high frequency and with a sufficiently large displacement so that the Reynold's number of the relative flow is greater than about 1.