Charles H Gates

US Patent:

7776974, Aug 17, 2010

Filed:

Apr 30, 2008

Appl. No.:

12/150724

Inventors:

Linda N. Winslow - Cincinnati OH, US
Sebastian Joseph - Mason OH, US
Sandor Nagy - Naperville IL, US
Natalia Nagy - Naperville IL, US
Barbara M. Tsuie - Cincinnati OH, US
Charles H. Gates - Lake Jackson TX, US

Assignee:

Equistar Chemicals, LP - Houston TX

International Classification:

C08F 2/00
C08F 4/6592
C08F 4/64
B01J 31/22

US Classification:

526 65, 526160, 526161, 526165, 526170, 526172, 526348, 526943

Abstract:

A slurry process for polymerizing ethylene is disclosed. The process comprises polymerizing ethylene in a first reactor in the presence of hydrogen and a catalyst comprising an activator and a supported dimethylsilyl-bridged indeno[1,2-b]indolyl zirconium complex to produce an ethylene homopolymer, removing some of the unreacted hydrogen, and reacting the homopolymer slurry in a second reactor with ethylene and a C-Cα-olefin to produce polyethylene. The polyethylene has weight-average molecular weight greater than 150,000, broad molecular weight distribution, low long-chain branching, and it provides pipes or molded articles with good environmental stress crack resistance.

US Patent:

20070055021, Mar 8, 2007

Filed:

Sep 2, 2005

Appl. No.:

11/218888

Inventors:

Venki Chandrashekar - Houston TX, US
Mark Mack - West Chester OH, US
Charles Gates - Lake Jackson TX, US
Charles Holland - Coal City IL, US
Natalia Nagy - Naperville IL, US
Sandor Nagy - Naperville IL, US
Edward Vargas - Loveland OH, US

International Classification:

C08L 23/04

US Classification:

525240000

Abstract:

Disclosed is a polyethylene composition. The composition comprises single-site multimodal resin A and single-site multimodal resin B, wherein resin A differs from resin B in molecular weight, in monomeric composition, in density, in long chain branch concentration or distribution, or in combinations thereof. Disclosed is also a method for making the polyethylene composition. The method comprises polymerizing, in the presence of two or more single-site catalysts, ethylene or its mixture with a C-Cα-olefin to form a first multimodal resin and continuing the polymerization in the presence of the same catalysts but in a different hydrogen concentration, in a different monomer composition, or at a different temperature to form a second multimodal resin.

US Patent:

43288537, May 11, 1982

Filed:

Dec 21, 1979

Appl. No.:

6/106357

Inventors:

George R. Gall - Chagrin Falls OH
Charles R. Gates - Novelty OH

International Classification:

F05D 1526

US Classification:

160183

Abstract:

A folding screen is formed by a plurality of successively hinged, rigid, radiation-controlling planar panels supported so the screen can be opened (or extended) and closed (or collapsed). Adjacent panels are supported only at their edges, by a hinge member having symmetrical back-to-back tubular channels. The hinge member possesses sufficient rigidity to permit hinged, side-by-side coaction of the panels from a stacked, generally vertical relationship when the screen is collapsed, to an undulating planar relationship when the screen is opened, which relationship is essential if the screen is to be collapsed without binding. The screen is translatable on a pair of parallel, mono-level tracks, and operated by a flexible drive member extending along a rail and connected to the screen's leading ("lead") panel. A novel skylight includes a curb assembly, a "bubble" (or "dome") and a folding screen translatable to-and-fro below the bubble. The curb assembly is mounted on a curb provided on the roof, and the assembly includes an access panel which allows access to the folding screen housed in the assembly.