Chen Chen

US Patent:

20130292186, Nov 7, 2013

Filed:

Mar 15, 2013

Appl. No.:

13/836603

Inventors:

MICHAEL G. AZAR - THE WOODLANDS TX, US
CHEN CHEN - THE WOODLANDS TX, US
YURI BURHAN - SPRING TX, US

Assignee:

SMITH INTERNATIONAL, INC. - HOUSTON TX

International Classification:

E21B 17/10

US Classification:

175408

Abstract:

A downhole cutting tool may include a tool body, a plurality of blades extending azimuthally from the tool body comprising a cone region, a shoulder region, and a gage region, at least one cutting element disposed along the cone region and the shoulder region of the blade, and at least one gage cutting element disposed along the gage region of the blade wherein the at least one gage cutting element has a negative backrake ranging from greater than 70 to about 85 degrees.

US Patent:

20130333953, Dec 19, 2013

Filed:

Mar 5, 2013

Appl. No.:

13/786085

Inventors:

SMITH INTERNATIONAL, INC. - , US
JIBIN SHI - SPRING TX, US
YURI BURHAN - SPRING TX, US
CHEN CHEN - THE WOODLANDS TX, US

Assignee:

SMITH INTERNATIONAL, INC. - HOUSTON TX

International Classification:

E21B 10/42

US Classification:

175428

Abstract:

A cutter assembly may include a sleeve; and at least one cutting element having a lower spindle portion retained in the sleeve and a portion of the cutting element interfacing an axial bearing surface of the sleeve, wherein an outer diameter D of the cutting element and a radial length T of a substantially planar portion of the axial bearing surface of the sleeve have the following relationship:

US Patent:

20140054094, Feb 27, 2014

Filed:

Aug 21, 2013

Appl. No.:

13/972465

Inventors:

Jibin Shi - Spring TX, US
Chen Chen - Houston TX, US
Youhe Zhang - Spring TX, US

Assignee:

Smith International, Inc. - Houston TX

International Classification:

E21B 10/50

US Classification:

175354

Abstract:

A cutting element is disclosed that includes a sleeve, a rotatable cutting element, and at least one retaining ring. The sleeve has a first inner diameter and a second inner diameter, wherein the second inner diameter is larger than the first inner diameter and located at a lower axial position than the first inner diameter. The rotatable cutting element has an axis of rotation extending therethrough, a cutting face, a body extending axially downward from the cutting face, wherein the body has a shaft that is disposed within the sleeve, and a circumferential groove formed around an outer surface of the shaft. The at least one retaining ring is disposed in the circumferential groove and extends at least around the entire circumference of the shaft, wherein the at least one retaining ring protrudes from the circumferential groove, thereby retaining the rotatable cutting element within the sleeve.

US Patent:

50128086, May 7, 1991

Filed:

Oct 17, 1988

Appl. No.:

7/258785

Inventors:

Ron Stubbers - Houston TX
Chen Chen - Houston TX
Malcolm Skolnick - Houston TX

Assignee:

Zion Educational Foundation - London

International Classification:

A61N 100

US Classification:

128419R

Abstract:

A pulse generation and tracking system for connection to an object or a subject under treatment therewith, the waveform being a train of repetitive complex pulses each pulse comprising a large amplitude, short duration positive polarity portion and a small amplitude, long duration negative polarity portion, and a zero value portion. The prescribed pulse train for a subject is delivered by a delivery device, which also provides monitoring of the averaged voltage amplitude of the positive portion in terms of either voltage or current value. The impedance of the subject is expected to change over time and cause the individual pulses to vary from predetermined limits. When this occurs, then a subsequent generation of pulses will be changed so that the pulses are again delivered within the predetermined value limits or boundary. Tracking and generation can be operationally crossed, if desired, so that a voltage out of boundary will cause the current of a subsequent pulse to be changed or vice versa.

US Patent:

47790440, Oct 18, 1988

Filed:

Sep 8, 1987

Appl. No.:

7/095009

Inventors:

Malcolm Skolnick - Houston TX
Ron Stubbers - Houston TX
Chris Hymel - Houston TX
Chen Chen - Houston TX

Assignee:

Zion Educational Foundation

International Classification:

G01R 2316

US Classification:

324 77R

Abstract:

A regularly repetitive, almost periodic but non-regularly shaped waveform is amplitude sampled at an interval different from that of the waveform under investigation. For a voltage measurement, the positive samples are averaged for a predetermined count number (one set) and the negative samples are likewise averaged. Zero value samples are ignored. The highest absolute value of the two is taken as a meaningful measurement. Alternatively, one of these values can be selected. For a current measurement, a running average for a predetermined number of sets can also be developed. Finally, frequency can be developed by sensing the transitions and operating a counter on/off at the beginning and ending of a waveform cycle. The count of regular interval counts is then multiplied by the interval time to give the period of the waveform. The reciprocal of the period is a measure of the frequency.

US Patent:

20220231203, Jul 21, 2022

Filed:

Apr 6, 2022

Appl. No.:

17/714814

Inventors:

- Branford CT, US
Chen Chen - Branford CT, US

Assignee:

Saphlux, Inc. - Branford CT

International Classification:

H01L 33/50
H01L 25/075
H01L 33/46

Abstract:

In accordance with one or more aspects of the present disclosure, a semiconductor device is provided. The semiconductor device may include: a plurality of light-emitting devices comprising a first light-emitting device, a second light-emitting device, and a third light-emitting device, wherein each of the plurality of light-emitting devices comprises a first ohmic contact and a second ohmic contact; and a light-conversion device with embedded quantum dots, wherein a first portion of the light-conversion device includes a first plurality of quantum dots for converting light produced by the first light-emitting device into light of a first color, wherein a second portion of the light-conversion device includes a second plurality of quantum dots for converting light produced by the second light-emitting device into light of a second color, and wherein the third light-emitting device emits light of a third color.

US Patent:

20230010350, Jan 12, 2023

Filed:

Dec 17, 2019

Appl. No.:

17/777761

Inventors:

- Mansfield MA, US
Steven J. Levine - Framingham MA, US
Albert Dvornik - Somerville MA, US
Mantena V. Raju - Medford MA, US
Chen Chen - Malden MA, US

International Classification:

A61B 34/37
A61B 90/00
A61B 34/00

Abstract:

( robotic surgical system with user engagement monitoring includes a surgeon console having a hand detection system and a tracking device including an image capture device configured to capture an image of a user position reference point, wherein information from the hand detection system and the tracking device are combined to control operation of the robotic surgical system.

US Patent:

20200295239, Sep 17, 2020

Filed:

Mar 11, 2020

Appl. No.:

16/816136

Inventors:

- Branford CT, US
Joo Won Choi - Branford CT, US
Chen Chen - Branford CT, US

International Classification:

H01L 33/50

Abstract:

Aspects of the disclosure provide for light conversion devices incorporating quantum dots and methods of fabricating the same. In accordance with some embodiments of the present disclosure, a light conversion device is provided. The light conversion device may include. a porous structure comprising one or more nanoporous materials, wherein the one or more nanoporous materials comprise a plurality of pores; and a plurality of quantum dots placed in the porous structure, wherein the plurality of quantum dots comprises a first plurality of quantum dots configured to convert light of a first color into light of a second color, and a second plurality of quantum dots configured to convert the light of the first color into light of a third color. Each of the plurality of pores may have a nanoscale size. The nonporous materials may further include a matrix comprising a semiconductor material, glass, plastic, metal, polymer, etc.