Chan S Bak, 88Camarillo, CA

5308552, May 3, 1994

Jul 10, 1992

7/911825

Chan S. Bak - Newbury Park CA
Leroy J. Miller - Canoga Park CA
Camille I. Van Ast - Newbury Park CA

Hughes Aircraft Company - Los Angeles CA

C10M 310

252570

A grating (22) of narrow parallel ridges (24) is formed in the surface (26) of a substrate (20) made of a hard material such as silicon dioxide. Metal (40) is deposited onto the grating (22) perpendicular to the ridges (24) at an angle of approximately 45. degree. to the surface (26) of the grating such that the metal (40) is deposited onto the top (24a) and one of the sides (24b) of the each of the ridges (24) to form generally L-shaped metal strips (12') thereon. The metal strips (12') are cut at periodic intervals along the ridges (24) to produce anisometric metal needles (12). The substrate (20) is immersed in a dielectric fluid (14), and ultrasonic energy is applied to cause the needles (12) to release from the substrate (20) into suspension in the fluid (14). The L-shape of the needles (12) makes them resistant to bending. The suspension ( 10) has birefringent properties similar to liquid crystals, but may be electrically switched at much higher speed.

5376463, Dec 27, 1994

Sep 20, 1993

8/124777

Chan S. Bak - Newbury Park CA
Leroy J. Miller - Canoga Park CA
Camille I. Van Ast - Newbury Park CA

Hughes Aircraft Company - Los Angeles CA

B22F 900

428547

A grating (22) of narrow parallel ridges (24) is formed in the surface (26) of a substrate (20) made of a hard material such as silicon dioxide. Metal (40) is deposited onto the grating (22) perpendicular to the ridges (24) at an angle of approximately 45. degree. to the surface (26) of the grating such that the metal (40) is deposited onto the top (24a) and one of the sides (24b) of the each of the ridges (24) to form generally L-shaped metal strips (12') thereon. The metal strips (12') are cut at periodic intervals along the ridges (24) to produce anisometric metal needles (12). The substrate (20) is immersed in a dielectric fluid (14), and ultrasonic energy is applied to cause the needles (12) to release from the substrate (20) into suspension in the fluid (14). The L-shape of the needles (12) makes them resistant to bending. The suspension (10) has birefringent properties similar to liquid crystals, but may be electrically switched at much higher speed.

5179993, Jan 19, 1993

Mar 26, 1991

7/674987

Chan S. Bak - Newbury Park CA
Leroy J. Miller - Canoga Park CA
Camille I. Van Ast - Newbury Park CA

Hughes Aircraft Company - Los Angeles CA

B22D 2300

164 46

A grating (22) of narrow parallel ridges (24) is formed in the surface (26) of a substrate (20) made of a hard material such as silicon dioxide. Metal (40) is deposited onto the grating (22) perpendicular to the ridges (24) at an angle of approximately 45. degree. to the surface (26) of the grating such that the metal (40) is deposited onto the top (24a) and one of the sides (24b) of the each of the ridges (24) to form generally L-shaped metal strips (12') thereon. The metal strips (12') are cut at periodic intervals along the ridges (24) to produce anisometric metal needles (12). The substrate (20) is immersed in a dielectric fluid (14), and ultrasonic energy is applied to cause the needles (12) to release from the substrate (20) into suspension in the fluid (14). The L-shape of the needles (12) makes them resistant to bending. The suspension ( 10) has birefringent properties similar to liquid crystals, but may be electrically switched at much higher speed.

5352481, Oct 4, 1994

Apr 29, 1993

8/055424

Chan S. Bak - Newbury Park CA
Hiroshi Kimura - Northridge CA
Ricardo C. Pastor - Manhattan Beach CA

Hughes Aircraft Company - Los Angeles CA

B05D 700

427212

A process is provided for fabricating coated particles of a substantially uniform particle size. The process comprises coating small particles of well-defined crystalline phases with a polymerized gel. The process results in a ball-type sol-gel coating of the particles to provide particles which have a narrow size distribution. In many instances, crystalline particles of irregular shape have a substantially spherical shape upon coating with the sol-gel. In instances where the core is a high melting point material, such as an oxide, nitride, or carbide, the coat formulation can effect a low sintering temperature, which permits forming films of the particles at a much lower temperature than would otherwise be possible.

4390291, Jun 28, 1983

Dec 10, 1980

6/215085

Joseph V. Gaven - Oakton VA
Chan S. Bak - Newbury Park CA

Spectro-Systems, Incorporated - Oakton VA

G01K 114
G01K 1106
G01K 1302

374160

Minute durable plate-like thermal indicators are employed for precision measuring static and dynamic temperatures of well drilling fluids. The indicators are small enough and sufficiently durable to be circulated in the well with drilling fluids during the drilling operation. The indicators include a heat resistant indicating layer, a coacting meltable solid component and a retainer body which serves to unitize each indicator and which may carry permanent indicator identifying indicia. The indicators are recovered from the drilling fluid at ground level by known techniques.