Xin C Chen

US Patent:

6716800, Apr 6, 2004

Filed:

Apr 12, 2002

Appl. No.:

10/122293

Inventors:

Joseph F. Demendi - Crystal Lake IL
Xin Chen - Crystal Lake IL
William R. Clemens - Carpentersville IL

Assignee:

John Crane Inc. - Morton Grove IL

International Classification:

C10M10300

US Classification:

508107, 508109, 501 88, 501 89, 501 90, 501 99, 428408, 428446, 428698, 264 291, 264682

Abstract:

A composite body of silicon carbide having binderless, allotropic carbon granules distributed throughout is produced. The nominal size of the binderless allotropic carbon granules can range from 5 to 500 micrometers. The concentration of the binderless allotropic carbon particles can vary from 1. 0 to 35. 0 weight percent. The process to produce such a composite body is to sinter silicon carbide with binderless, carbon-yielding precursor granules. The composite body is utilized in tribological applications. The dense, impervious silicon carbide-binderless carbon composite exhibits excellent physical and tribological characteristics when used as a mechanical face seal, a sliding bearing arrangement, or some other rubbing component.

US Patent:

7166550, Jan 23, 2007

Filed:

Jan 7, 2005

Appl. No.:

11/031475

Inventors:

Xin Chen - Deer Park IL, US

International Classification:

C04B 35/577
C04B 35/5833

US Classification:

501 90, 501 92, 501 964

Abstract:

A ceramic composite body comprising sintered silicon carbide as major phase, dispersed boron nitride/carbon granules as minor phase, and the boron nitride/carbon granules comprise hexagonal phase boron nitride powders bonded together by glassy carbon. The composite body contains at least 3 weight percent of boron nitride, the average size of the boron nitride granules is greater than 10 micrometers, and the shape of majority of the granules is irregular. The composite body of high boron nitride loading can be further processed to improve mechanical and thermal properties by filling the porosity with glassy carbon, obtained from carbonizing glassy carbon precursor. The composite material exhibits superior thermal and tribological characteristics than monolithic silicon carbide.

US Patent:

8086071, Dec 27, 2011

Filed:

Oct 30, 2007

Appl. No.:

11/980033

Inventors:

Xin Chen - Evanston IL, US
William Gale - Oak Park IL, US

Assignee:

NAVTEQ North America, LLC - Chicago IL

International Classification:

G06K 9/36
G06K 9/00
G06T 15/40
G06G 5/13

US Classification:

382284, 382154, 382103, 345629, 345421

Abstract:

Disclosed are a system and method for identifying objects in an image dataset that occlude other objects and for transforming the image dataset to reveal the occluded objects. In some cases, occluding objects are identified by processing the image dataset to determine the relative positions of visual objects. Occluded objects are then revealed by removing the occluding objects from the image dataset or by otherwise de-emphasizing the occluding objects so that the occluded objects are seen behind it. A visual object may be removed simply because it occludes another object, because of privacy concerns, or because it is transient. When an object is removed or de-emphasized, the objects that were behind it may need to be “cleaned up” so that they show up well. To do this, information from multiple images can be processed using interpolation techniques. The image dataset can be further transformed by adding objects to the images.

US Patent:

8351672, Jan 8, 2013

Filed:

Sep 26, 2007

Appl. No.:

11/861791

Inventors:

Yang Tao - North Potomac MD, US
Xin Chen - Gaithersburg MD, US
Hansong Jing - Hyatsville MD, US
Bin Zhu - College Park MD, US
Fenghua Jin - Beltsville MD, US

Assignee:

Industry Vision Automation Corp. - Gaithersburg MD

International Classification:

G06K 9/00

US Classification:

382132, 382141, 250370, 250484

Abstract:

A combined X-ray and laser 3D imaging system for food safety inspection, which uses a 3D laser subsystem to get accurate depth information, which is further combined with an x-ray image to achieve accurate physical contamination detection in poultry and other meat products. A unique calibration model is used to calibrate the x-ray and laser 3D imaging systems at the same time. And a nested multi-thread software structure is implemented to prevent data conflict and ensure fully use of system resources during the physical contamination detection of the poultry and other meat products.

US Patent:

20060116325, Jun 1, 2006

Filed:

Feb 15, 2002

Appl. No.:

10/468182

Inventors:

Oleg Chertov - Frederick MD, US
Joost Oppenheim - Bethesda MD, US
Xin Chen - Frederick MD, US
Connor McGrath - Union Bridge MD, US
Raymond Sowder - Frederick MD, US
Jacek Lubkowski - Frederick MD, US
Michele Wetzel - Souderton PA, US
Thomas Rogers - North Wales PA, US

International Classification:

A61K 38/10

US Classification:

514013000, 514014000

Abstract:

Novel methods and compositions are provided for inhibiting interactions between human immunodeficiency viruses (HIVs) and viral coreceptors, including CXCR4 and/or CCR5 coreceptors. The anti-coreceptor binding agent includes a novel peptide portion of the gp120 envelope protein of HIV-1, as well as peptide analogs and mimetics of this peptide, that specifically binds to, or modulates activity of, the coreceptors(s). The anti-coreceptor binding agent is useful as a prophylactic or therapeutic treatment to prevent or inhibit HIV binding to a susceptible cell and thereby reduces infection and/or moderates or treats related diseases. In alternative embodiments, the peptides, analogs and mimetics are effective to inhibit direct co-receptor binding by HIV virus, coreceptor binding by HIV gp120 proteins or peptides, HIV fusion with target host cells, HIV virion entry into host cells, HIV replication, and HIV transmission between cells and hosts. In more detailed embodiments, the anti-coreceptor binding agents of the invention are multi-tropic by exhibiting activity against HIV interactions with multiple, CXCR4 and CCR5, coreceptors.

US Patent:

20100217529, Aug 26, 2010

Filed:

Feb 20, 2009

Appl. No.:

12/389553

Inventors:

Matei Nicolai Stroila - Chicago IL, US
Xin Chen - Evanston IL, US
Mahsa Kamali Moghaddam - Champaign IL, US
Victor Lu - Urbana IL, US
Bradley Dean Kohlmeyer - Lisle IL, US

International Classification:

G06F 19/00
G01S 1/00
G01C 3/06

US Classification:

702 5, 34235706, 356 401

Abstract:

Systems, devices, features, and methods for determining geographic features corresponding to a travel path to develop a map database, such as a navigation database, are disclosed. For example, one method comprises emitting light from a light source, such as a LIDAR device, while on the travel path. Returning light is received based on the emitted light. The returning light is used to generate data points representing an area about the travel path. The data points are filtered as a function of a return intensity value to identify a feature associated with the travel path, in which the feature is treated with a retroreflective substance.

US Patent:

20100321489, Dec 23, 2010

Filed:

Jun 23, 2009

Appl. No.:

12/489737

Inventors:

Xin Chen - Evanston IL, US
Xiangheng Yang - Glenview IL, US
Roger B. Hui - Northbrook IL, US
Narayanan Alwar - South Barrington IL, US

International Classification:

H04N 7/18

US Classification:

348116, 348E07085

Abstract:

Systems, devices, features, and methods for determining geographic position information from an image are disclosed. For example, one method for determining the geographic position information is used to develop a navigation database. The method comprises capturing a plurality of images of geographic features by a camera mounted on a vehicle or a pedestrian. A single image from the plurality of images is identified or selected. A real-world ground distance between a reference ground point in the single image and a ground point corresponding to an object in the single image is determined based on determined calibration values corresponding to the camera. Real-world geographic position information, such as a latitude coordinate and a longitude coordinate, of the ground point corresponding to the object in the single image is determined based on the determined real-world ground distance.

US Patent:

20100321490, Dec 23, 2010

Filed:

Jun 23, 2009

Appl. No.:

12/489697

Inventors:

Xin Chen - Evanston IL, US
Roger B. Hui - Northbrook IL, US
Narayanan Alwar - South Barrington IL, US

International Classification:

H04N 7/18

US Classification:

348118, 348E07085

Abstract:

Systems, devices, features, and methods for determining a geometric parameter from an image are disclosed. For example, one method for determining the geometric parameter is used to develop a navigation database. The method comprises determining calibration values corresponding to a camera mounted on a vehicle or a pedestrian. A plurality of images of geographic features are captured by the camera. A single image from the plurality of images is identified or selected. A geometric parameter of a region in the single image is determined based on the determined calibration values. For example, the geometric parameter is a real-world distance, such as a real-world length or width.