David C Yang

US Patent:

7599373, Oct 6, 2009

Filed:

Jul 19, 2004

Appl. No.:

10/894418

Inventors:

Kadangode K. Ramakrishnan - Berkeley Heights NJ, US
Robert Duncan Doverspike - Tinton Falls NJ, US
David H. Yang - Marlboro NJ, US

Assignee:

AT&T Corp. - New York NY

International Classification:

H04L 12/28

US Classification:

3703951, 370392, 3703955, 370466

Abstract:

Method and apparatus for automated provisioning for customer premises transport equipment supporting both circuit and packet traffic.

US Patent:

20090216593, Aug 27, 2009

Filed:

May 5, 2009

Appl. No.:

12/435587

Inventors:

Ron Gonen - New York NY, US
Frank Yang - Framingham MA, US
David Yang - New York NY, US

International Classification:

G06Q 10/00
G06Q 30/00
G06Q 50/00

US Classification:

705 7, 705 14

Abstract:

Embodiments of the present invention relate to a point-source asset system for managing an incentive-based environmentally-conscious behavior program and methods of implementing the same. In one embodiment, a system comprises: an administrative entity, communicably accessible via a computer network, comprising a database; a consumer entity having an entity account stored on the database; an environmentally-conscious sub-program, comprising a point-source asset, associated with the consumer entity; a means for monitoring point-source asset activity within the environmentally-conscious sub-program; and a means for granting a credit value, correlating to the point-source asset activity, to the entity account.

US Patent:

55073930, Apr 16, 1996

Filed:

Sep 14, 1994

Appl. No.:

8/306033

Inventors:

David C. Yang - Morgantown WV

International Classification:

B03B 566

US Classification:

209160

Abstract:

A gravitational separation device is provided and the process is provided involving a packed column containing a packing material and having a device for vibrating the packed column and the particles. The gravitational separation device allows for efficient and effective separation of solid particles having different densities. The process preferably involves conditioning an aqueous pulp of mineral ore with a dispersant and feeding the dispersed aqueous pulp into an inlet into an intermediate section of the packed column and forming a high density bed of high density particles in a lower portion of the column, and forming a low density bed of low density particles in an upper portion of the column. Tailings are removed from the upper end of the column and concentrated mineral ore having reduced levels of gangue are removed from the bottom of the column. The device and process are especially useful in the separation of silica particles having small particle sizes from iron ore particles having small particle sizes.

US Patent:

45928347, Jun 3, 1986

Filed:

May 9, 1985

Appl. No.:

6/732902

Inventors:

David C. Yang - Houghton MI

Assignee:

Board of Control of Michigan Technological University - Houghton MI

International Classification:

B03D 102

US Classification:

209166

Abstract:

The froth flotation device includes a flotation column partially filled with a packing which defines a large number of small flow passages extending in a circuitous pattern between the upper and lower portions of the column. A conditioned aqueous pulp of a mineral ore, such as iron ore, is introduced into the midzone of the column. A pressurized inert gas, such as air, is introduced into the bottom of the column and is forced upwardly through the flow passages in the packing. As the air flows upwardly through these flow passages, it is broken into fine bubbles which intimately contact the floatable particles (e. g. , iron oxide) in the aqueous pulp and forms a froth concentrate or float fraction which overflows from the top of the column. Wash water is introduced into the top of the column and flows through the flow passages in the packing countercurrently to the float fraction to scrub entrained non-floatable particles (e. g. , gangue) from the froth concentrate.

US Patent:

40986870, Jul 4, 1978

Filed:

Jan 13, 1977

Appl. No.:

5/759092

Inventors:

David C. Yang - Houghton MI

Assignee:

Board of Control of Michigan Technological University - Houghton MI

International Classification:

B03D 102

US Classification:

209166

Abstract:

A high grade fraction is recovered from lithium-containing ores by conditioning a finely-ground aqueous pulp of the ore with a conditioning reagent formed by incorporating a water-soluble polyvalent metal salt into an aqueous solution of an alkali metal silicate and with an anionic collector and then subjecting the conditioned pulp, without desliming, to a froth flotation operation whereby a concentrate containing lithium and a tailing containing gangue are produced.

US Patent:

41326350, Jan 2, 1979

Filed:

Jan 13, 1977

Appl. No.:

5/759094

Inventors:

David C. Yang - Houghton MI

Assignee:

Michigan Technological University - Houghton MI

International Classification:

B03D 102

US Classification:

209166

Abstract:

Iron oxides of finely-ground, low grade, siliceous oxidized iron ores can be effectively floated from the silica-bearing gangue in the presence of slime by conditioning an aqueous pulp of the ore with a reagent formed by incorporating a water-soluble polyvalent metal salt into an aqueous solution of an alkali metal silicate prior to subjecting the pulp to froth flotation in the presence of an anionic type collector.