William L Walston, 781041 Washington Ave, Lancaster, OH 43130

6444057, Sep 3, 2002

May 26, 1999

09/318636

Ramgopal Darolia - West Chester OH
Jeffrey A. Pfaendtner - Blue Ash OH
William S. Walston - Maineville OH

General Electric Company - Schenectady NY

C22C 1905

148428, 420448

An article is formed of a single crystal having a composition, in weight percent, of a modifying element in an amount of from about 0. 2 to about 2. 0 percent by weight hafnium, from about 0. 1 to about 0. 5 percent by weight zirconium, or combinations thereof, and a base alloy composition of from about 4 to about 20 percent cobalt, from about 1 to about 10 percent chromium, from about 5 to about 7 percent aluminum, from 0 to about 2 percent molybdenum, from about 3 to about 8 percent tungsten, from about 4 to about 12 percent tantalum, from 0 to about 2 percent titanium, from 0 to about 8 percent rhenium, from 0 to about 6 percent ruthenium, from 0 to about 1 percent niobium, from 0 to about 0. 1 percent carbon, from 0 to about 0. 01 percent boron, from 0 to about 0.

6502304, Jan 7, 2003

May 15, 2001

09/855444

Joseph David Rigney - Milford OH
William Scott Walston - Mason OH
Richard John Grylls - Albuquerque NM

General Electric Company - Schenectady NY

B23P 1500

2988921, 2988922

Optimized tip performance for turbine airfoils is obtained through a sequenced manufacturing process. The turbine airfoils are assembled into the dovetail slots of a turbine disk. The tips of the turbine airfoils assembled in the turbine disk are then measured to determine the turbine airfoils that do not have adequate tip clearance. The tips of those turbine airfoils that do not have adequate tip clearance are then machined to obtain adequate tip clearance. Once all the turbine airfoils have adequate tip clearance, environmental coatings and/or thermal barrier coatings are applied to the blade tips.

6514629, Feb 4, 2003

Dec 15, 1998

09/210855

Joseph D. Rigney - Milford OH
Ramgopal Darolia - West Chester OH
William S. Walston - Maineville OH

General Electric Company - Schenectady NY

B32B 1504

428632, 428654, 428652, 428670, 428680, 428941, 416241 R

An article such as a gas turbine blade or vane has a superalloy substrate, and a coating system deposited on the substrate. The coating system includes a protective layer overlying the substrate, and, optionally, a ceramic thermal barrier coating layer overlying the bond coat. The protective layer has an uppermost layer with a composition including platinum, aluminum, and, in atom percent, from about 0. 14 to about 2. 8 percent hafnium and from about 2. 7 to about 7. 0 percent silicon, with the atomic ratio of silicon:hafnium being from about 1. 7:1 to about 5. 6:1.

6551423, Apr 22, 2003

Sep 8, 1998

09/149018

Irene T. Spitsberg - Loveland OH
William S. Walston - Maineville OH
Jon C. Schaeffer - Milford OH

General Electric Co. - Cincinnati OH

C25D 510

148518, 148535

A method for preparing a coated nickel-base superalloy article reduces the sulfur content of the surface region of the metallic coating layers to low levels, thereby improving the adhesion of the coating layers to the article. The method includes depositing a first layer of platinum overlying the surface of a substrate, depositing a second layer of aluminum over the platinum, and final desulfurizing the article by heating the article to elevated temperature, preferably in hydrogen, and removing a small amount of material from the surface that was exposed during the step of heating. A ceramic layer may be deposited over the desulfurized article. The article may also be similarly desulfurized at other points in the fabrication procedure.

6582772, Jun 24, 2003

Sep 30, 2002

10/262114

Joseph D. Rigney - Milford OH
Ramgopal Darolia - West Chester OH
William S. Walston - Maineville OH

General Electric Company - Schenectady NY

B05D 136

427404, 4273761, 4273831, 4273833, 4273837, 427405, 4274191, 4274192

An article such as a gas turbine blade or vane has a superalloy substrate, and a coating system deposited on the substrate. The coating system includes a protective layer overlying the substrate, and, optionally, a ceramic thermal barrier coating layer overlying the bond coat. The protective layer has an uppermost layer with a composition including platinum, aluminum, and, in atom percent, from about 0. 14 to about 2. 8 percent hafnium and from about 2. 7 to about 7. 0 percent silicon, with the atomic ratio of silicon:hafnium being from about 1. 7:1 to about 5. 6:1.

6656533, Dec 2, 2003

Dec 10, 2001

10/013632

William S. Walston - Mason OH, 45040
Jon C. Schaeffer - Simpsonville SC, 29681
Wendy H. Murphy - Cincinnati OH, 45241

B05D 136

427404, 427405, 4274191, 4274192

A coated article is prepared by furnishing an nickel-base article substrate having a free sulfur content of more than 0 but less than about 1 part per million by weight. A protective layer is formed at a surface of the article substrate. The protective layer includes a platinum aluminide diffusion coating. The protective layer may be substantially yttrium-free, or have a controlled amount of yttrium. A ceramic layer may overlie the protective layer.

6797408, Sep 28, 2004

Dec 11, 2001

10/013878

William S. Walston - Mason OH
Jon C. Schaeffer - Simpsonville SC
Wendy H. Murphy - Cincinnati OH

General Electric Company - Schenedctady NY

B32B 1504

428632, 428615, 428670, 428680, 428941, 416241 R

A coated article is prepared by furnishing an nickel-base article substrate having a free sulfur content of more than 0 but less than about 1 part per million by weight. A protective layer is formed at a surface of the article substrate. The protective layer includes a platinum aluminide diffusion coating. The protective layer may be substantially yttrium-free, or have a controlled amount of yttrium. A ceramic layer may overlie the protective layer.

6843861, Jan 18, 2005

Feb 8, 2002

10/071129

Theodore Robert Grossman - Hamilton OH, US
Ronald Gustav Rajala - Loveland OH, US
Dwayne Edward Burnett - Liberty Township OH, US
William Scott Walston - Mason OH, US
Wendy Howard Murpjy - Cincinnati OH, US

General Electric Company - Schenectady NY

C23C 804
B32B 1510
B41M 312

148280, 148516, 148535, 228208, 428652, 427142

A coated nickel-base superalloy article, which is otherwise susceptible to the formation of a secondary reaction zone, is prepared by furnishing a nickel-base superalloy article substrate having thereon an initial aluminum-containing coating comprising an initial-coating additive zone and an initial-coating diffusion zone. The article is susceptible to the formation of the secondary reaction zone if heated to an elevated SRZ reaction temperature for an SRZ reaction period of time. The formation of the secondary reaction zone is avoided by first removing the initial-coating additive zone and the initial-coating diffusion zone, and thereafter depositing a subsequent aluminum-containing coating onto the article substrate. The subsequent aluminum-containing coating includes a subsequent-coating additive zone and a subsequent-coating diffusion zone. The article substrate with the subsequent aluminum-containing coating is otherwise susceptible to the formation of the secondary reaction zone if heated to the elevated SRZ reaction temperature for the SRZ reaction period of time.