Lei S Zhang

US Patent:

20080171675, Jul 17, 2008

Filed:

May 26, 2006

Appl. No.:

11/667237

Inventors:

Lisa Ching Yeh - Marlton NJ, US
Elizabeth Stavens - Seabrook TX, US
Robert R. Palmer - Bethlehem PA, US
Michael Lacey - Pearland TX, US
Lei Zhang - Vienna VA, US

International Classification:

C10M 101/02
C10M 105/02

US Classification:

508110, 208 18

Abstract:

This invention relates to basestocks and base oils with improved low temperature properties and formulated lubricant compositions or functional fluids created by blending at least one such lube basestock with at least one component selected from dispersants, detergents, wear inhibitors, antioxidants, rust inhibitors, demulsifiers, extreme pressure agents, friction modifiers, multifunction additives, viscosity index improvers, pour point depressants, and foam inhibitors. In particular the invention relates to dewaxed lube basestocks having a Free Carbon Index of less than 4.3 and an Epsilon Carbon mole % of less than 14%. Formulated engine oils using such dewaxed basestocks exhibit improved low temperature properties as may be measured by the Mini Rotary Viscometer test.

US Patent:

20090238955, Sep 24, 2009

Filed:

Mar 16, 2009

Appl. No.:

12/404511

Inventors:

Juan Carlos Figueroa - Wilmington DE, US
Zhigang Rick Li - Hockessin DE, US
Cengiz Ahmet Palanduz - Durham NC, US
Damien Francis Reardon - Wilmington DE, US
Lei Zhang - Hockessin DE, US

Assignee:

E. I. DU PONT DE NEMOURS AND COMPANY - Wilmington DE

International Classification:

B05D 5/12

US Classification:

427 79

Abstract:

Provided are processes for the manufacture of capacitors. It is found that by using a nickel foil as the substrate and one electrode of the capacitor and by controlling the oxygen partial pressure in the range of 10to 10atmospheres during the crystallization heat treatment of the barium titanate, the leakage current can be maintained at adequate values without a reoxygenation step.

US Patent:

20230082265, Mar 16, 2023

Filed:

Sep 6, 2022

Appl. No.:

17/903762

Inventors:

- Wilmington DE, US
Benjamin Samson - Wilmington DE, US
Kenneth Hernandez - Stoneham MA, US
Ross S Johnson - Wilmington DE, US
Dennis Walls - Wilmington DE, US
Neng Xiao - Bear DE, US
Lei Zhang - Hockessin DE, US
Joseph Casey Johnson - Pickerington OH, US

International Classification:

B32B 27/28
B32B 17/10

Abstract:

In a first aspect, an article includes an inorganic substrate and a polymer film layer. The inorganic substrate includes a material including a ceramic, a glass, a glass-ceramic or a mixture thereof. The material includes a metal cation selected from the group consisting of silicon, aluminum, titanium, zirconium, tantalum, niobium and mixtures thereof and oxygen. The polymer film layer includes a polymer including an imide group. From an interface where the inorganic substrate contacts the polymer film layer, a line-profile of a CNO— signal from negative secondary ion mass spectroscopy decreases as it moves away from the interface and into the bulk of the polymer film layer.

US Patent:

20140137937, May 22, 2014

Filed:

Jan 6, 2014

Appl. No.:

14/147713

Inventors:

- Wilmington DE, US
FENG GAO - HOCKESSIN DE, US
HAIXIN YANG - CHAPEL HILL NC, US
LEI ZHANG - HOCKESSIN DE, US

Assignee:

E I DU PONT DE NEMOURS AND COMPANY - Wilmington DE

International Classification:

H01L 31/0216

US Classification:

136256, 438 72

Abstract:

This invention provides a method of making a photovoltaic cell. The method uses an etching composition comprising one or more onium salts selected from the group consisting of iodonium salts and sulfonium and an organic medium to etch the anti-reflection coating. Also provided is a photovoltaic cell made by this method.