ROBERT W BALLIETT
Engineers in Westboro, MA

6730279, May 4, 2004

May 9, 2001

09/852207

Robert W. Balliett - Westborough MA
Wolfgang Kummer - Goslar, DE
John E. Litz - Golden CO
Lawrence F. McHugh - Wellesley MA
Harry H. K. Nauta - TG Brielle, NL
Paul B. Queneau - Golden CO

H. C. Starck, Inc. - Newton MA

C01G 3900

423 54, 423 56

High purity ammonium dimolybdate or molybdenum oxide is produced by the pressure oxidation of low grade molybdenite concentrates or molybdenum intermediates. The process entails nearly complete oxidation of the sulfide minerals while optimizing the process chemistry and autoclave conditions to solubilize as little of the molybdenum values as possible. The autoclave discharge is then subjected to a leaching step, either an alkaline leach or ammonium leach process, before or after a liquid/solid separation step. The solution is then subjected to (a) filtration , solvent extraction , crystallization , and calcination or (b) filtration , crystallization , and calcination to produce a product suitable for chemical-grade molybdenum oxide.

H002087, Nov 4, 2003

May 19, 1998

09/081321

Robert W. Balliett - Westborough MA
Arthur H. Bronstein - Canton MA
Thomas J. Ryan - Canton MA
Michael Greengart - Newton MA
Daniel J. Moynihan - Watertown MA
Douglas A. Ryan - Stoughton MA
Paul Queneau - Golden CO
Mark Berggren - Golden CO
Brandon Hagen - Golden CO

H. C. Starck, Inc. - Newton MA

C23G 2300

134 3

Refractory metal pickling bath of HF/H O aqueous solution with recovery of the etched metal as a salt thereof and separation of dissolved impurities taken from the refractory metal, with avoidance of drawbacks of state of the art HF/HNO pickling solutions.

6521173, Feb 18, 2003

Jul 16, 2001

09/906208

Prabhat Kumar - Framingham MA
Paul Aimone - Bridgewater MA
Robert W. Balliett - Westboro MA
Anthony V. Parise - Nashua NH
Thomas M. Ramlow - Medfield MA
Henning Uhlenhut - Cambridge MA

H.C. Starck, Inc. - Newton MA

B22F 310

419 23, 419 38

A method of making sheet bar and other precursors of formed products to be made by extensive working. The method includes providing a powder metal, preferably under 100 PPM oxygen content of non-spherical particles, compacting the powder into a coherent precursor form of at least 100 pounds, whereby a precursor is provided enabling extended fabrication to a finished product form. The finished product is resistant to breakup in fabrication due to oxide inclusion effect and produces a low oxygen end product. The method can process multiple species of metals that include at least one higher melting metal and one lower melting metal to produce an alloy or micro-composite of the metals as worked, where one metal is preferably a refractory metal (Ta, Nb, W, Wo, Zr, Hf, V and Re). The process is controlled to cause powder of the higher melting metal to be extended into a fibrous form.

5676005, Oct 14, 1997

Mar 27, 1996

8/622848

Robert W. Balliett - Westborough MA

H. C. Starck, Inc. - Newton MA

B21B 4502, B21B 4504

72 42

A process for drawing wire employing a lubricant comprising perfluorocarbon compounds (PFCs), including aliphatic perfluorocarbon compounds (. alpha. -PFCs) having the general formula C. sub. n F. sub. 2n+2, perfluoromorpholines having the general formula C. sub. n F. sub. 2n+1 ON, perfluoroamines (PFAs) and highly fluorinated amines (HFAs), and perfluoroethers (PFEs). Such fully and highly fluorinated carbon compounds exhibit a very high degree of thermal and chemical stability due to the strength of the carbon-fluorine bond. Further, because the compounds are fully fluorinated, and therefore do not contain chlorine and bromine, they have zero ozone depletion potential (ODP). Further, because the compounds are photochemically non-reactive in the atmosphere, they are not precursors to photochemical smog and are exempt from the United States Environmental Protection Agency (EPA) volatile organic compound (VOC) definition. Further, because they are volatile, the compounds are easily removed at the end of the process without need for an additional cleaning step. The process provides wire at significantly higher production speeds and longer die life with improved quality and less byproduct debris.

5918104, Jun 29, 1999

Dec 24, 1997

8/997907

Robert W. Balliett - Westborough MA
Trung Luong - Worcester MA

H.C. Starck, Inc. - Newton MA

C22C 104, C22C 2702

419 46

Powder metallurgy production of Ta10W alloy affording properties comparable to melt derived Ta10W, but at higher yields and lower costs, is enabled by blending component powders of minus 325 mesh and sintering at 2,400. degree. C. in three sinter steps and utilizing a slow ramp up in the first sinter step and cold isostatic pressing prior to the first sinter step and isostatic press densification in conjunction with at least the first sinter step.

5743120, Apr 28, 1998

May 12, 1995

8/439525

Robert W. Balliett - Westborough MA

H.C. Starck, Inc. - Newton MA

B21B 4502

72 42

A process for drawing wire employing a lubricant composed of perfluorocarbon compounds having the general formula C. sub. n F. sub. 2n+2. Such fully fluorinated carbon compounds exhibit a very high degree of thermal and chemical stability, due to the strength of the carbon-fluorine bond. Further, because the compounds are fully fluorinated, and therefore do not contain chlorine and bromine, they have zero ozone depletion potential (ODP). Further, because the PFCs are photochemically non-reactive in the atmosphere, they are not precursors to photochemical smog and are exempt from the federal volatile organic compound (VOC) definition.

5940675, Aug 17, 1999

Dec 24, 1997

8/998101

Robert W. Balliett - Westborough MA
Trung Luong - Worcester MA

H. C. Starck, Inc. - Newton MA

B22F 300

419 54

Powder metallurgy production of T222 alloy affording properties comparable to melt derived T222, but at higher yields and lower costs, is enabled by blending component powders of minus 325 mesh and sintering at 2,400. degree. C. in three sinter steps and utilizing a slow ramp up in the first sinter step and cold isostatic pressing prior to the first sinter step and isostatic press densification in conjunction with at least the first sinter step.

2002001, Feb 14, 2002

Feb 17, 1998

08/952172

ROBERT W. BALLIETT - WESTBOROUGH MA, US

C 10M 1 5/50, C 10M 1 5/52, C 10M 1 5/54, B21B045/02

508/246000, 508/545000, 508/582000, 508/588000, 508/590000, 072/042000

Processes for working of refractory metals and other metals employing a lubricant comprising perfluorocarbon compounds (PFCs), including aliphatic perfluorocarbon compounds (-PFCs) having the general formula: CF, perfluoromorpholines having the general formula: CFON, perfluoroamines (PFAs) and highly fluorinated amines (HFAs), and perfluoroethers (PFEs) and highly fluorinated ethers (HFEs), and their polymerization products.

2005001, Jan 27, 2005

Sep 26, 2001

10/477080

Robert Balliett - Westborough MA, US
Wolfgang Kummer - Goslar, DE
John Litz - Golden CO, US
Lawrence MHugh - North Andover MA, US
Harry Nauta - Brielle, NL
Paul Queneau - Golden CO, US

C01G039/02

423592100

High purity ammonium dimolybdate or molybdenum oxide is produced by the pressure oxidation of low grade molybdenite concentrates or molybdenum intermediates. The process entails nearly complete oxidation of the sulfide minerals while optimizing the process chemistry and autoclave conditions to solubilize as little of the molybdenum values as possible. The autoclave discharge is then subjected to a leaching step, either an alkaline leach or ammonium leach process, before or after a liquid/solid separation step . The solution is then subjected to (a) filtration , solvent extraction , crystallization , and calcination or (b) filtration , crystallization , and calcination to produce a product suitable for chemical-grade molybdenum oxide

6269536, Aug 7, 2001

Mar 28, 1996

8/623629

Robert W. Balliett - Westborough MA

H.C. Starck, Inc. - Newton MA

H01R 4300

29825

Production of low oxygen forms of tantalum and other refractory metals providing hydrided powder of the metal, forming a tube (10), pouring the metal into the tube, dehydriding the powder in the tube and sealing the tube and extruding to form a rod encased in the tube and further fabricating the rod.