TERRANCE B TRIPP
Broker in Westboro, MA

5442978, Aug 22, 1995

May 19, 1994

8/245895

Richard Hildreth - Holliston MA
Malcolm Shaw - Medfield MA
Terrance B. Tripp - Westboro MA
Leo G. Gibbons - Littleton MA

H. C. Starck, Inc. - Newton MA

B22F 900

75363

Fine tantalum powder of high surface area, high capacitance, low leakage and high breakdown voltage is produced by sodium reduction of highly dilute fluotantalate salt charges at high reaction temperatures and stepwise additions of the sodium reducing agent in a time-series of substantially even weight slugs added over the whole course of the reduction reaction to a melt of the charge and using the small exotherm of reduction provided by each slug as a temperature control factor.

6515846, Feb 4, 2003

Feb 7, 2000

09/499857

Terrance B. Tripp - Westborough MA

H.C. Starck, Inc. - Newton MA

H01G 9145

361508, 361509, 361303, 361305, 3613211, 438253, 438396, 257295, 257298

Metal nitride compound powder substrate for capacitor anodic oxide film and the substrate interface therebetween, characterized, relative to un-nitrided analogs, by reduced temperature bias and frequency dependencies of capacitance, the substrate-anodic oxide interface being substantially insensitive to heating compared to the un-nitrided analog.

6554884, Apr 29, 2003

Oct 24, 2000

09/695512

Terrance B. Tripp - Westborough MA
Barbara L. Cox - West Roxbury MA

H.C. Starck, Inc. - Newton MA

B22F 100

75252

A process for producing sintered pellets made from blends of refractory metal and refractory metal nitride powders were found to have a higher fraction of intra-agglomerate pores than those made from the refractory metal or refractory metal nitride alone resulting in improved capacitor grade powders, anodes and finished capacitors therefrom. The pellet porosity and total intrusion volume maximizes when the mixture is in the 50-75 W/W % refractory metal nitride range. The total pellet pore surface area was found to be relatively independent of refractory metal nitride concentration above 50%. A substrate consisting of a 50/50 or 25/75 W/W % refractory metal/refractory metal nitride powder mixture should produce solid capacitors with higher capacitance recovery and lower ESR.

6716389, Apr 6, 2004

Oct 25, 2002

10/280295

Terrance B. Tripp - Westborough MA
Barbara L. Cox - West Roxbury MA

H. C. Starck Inc - Newton MA

B22F 300

419 13, 419 26, 419 48, 75252, 361509, 361529

A process for producing sintered pellets made from blends of refractory metal and refractory metal nitride powders were found to have a higher fraction of intra-agglomerate pores than those made from the refractory metal or refractory metal nitride alone resulting in improved capacitor grade powders, anodes and finished capacitors therefrom. The pellet porosity and total intrusion volume maximizes when the mixture is in the 50-75 W/W % refractory metal nitride range. The total pellet pore surface area was found to be relatively independent of refractory metal nitride concentration above 50%. A substrate consisting of a 50/50 or 25/75 W/W % refractory metal/refractory metal nitride powder mixture should produce solid capacitors with higher capacitance recovery and lower ESR.

6558447, May 6, 2003

Mar 16, 2001

09/445331

Leonid N. Shekhter - Newton MA
Terrance B. Tripp - Westboro MA
Leonid L. Lanin - Belmont MA
Karlheinz Reichert - Wolfenbuttel, DE
Oliver Thomas - Bad Harzburg, DE
Joachim Vieregge - Goslar, DE

H.C. Starck, Inc. - Newton MA

B22F 100

75252, 75352, 75369, 75245

Metal powder Ta and/or Nb, with or without one or metals from the group Ta, Nb, Ti, Mo, W, V, Zr and Hf, is made in a fine powder form by reduction of metal oxide by contact with a gaseous reducing agent, preferably an alkaline earth metal, to near complete reduction, leaching, further deoxidation and agglomeration, the powder so produced being sinterable to capacitor anode form and processable to other usages.

6171363, Jan 9, 2001

May 6, 1998

9/073488

Leonid N. Shekhter - Newton MA
Terrance B. Tripp - Westboro MA
Leonid L. Lanin - Belmont MA

H. C. Starck, Inc. - Newton MA

B22F 922

75369

Metal powder from the group Ta, Nb, Ti, Mo, W, V, Zr, Hf preferrably Ta or Nb, is made in a fine powder form by reduction of metal oxide by contact with a gaseous reducing agent, preferrably an alkaline earth metal, to near complete reduction, leaching, further deoxidation and agglomeration, the powder so produced being sinterable to capacitor anode form and processable to other usages.

6849104, Feb 1, 2005

May 4, 2001

09/849717

Leonid N. Shekhter - Newton MA, US
Terrance B. Tripp - Westboro MA, US
Leonid L. Lanin - Belmont MA, US
Anastasia M. Conlon - Canton MA, US
Howard V. Goldberg - Framingham MA, US

H. C. Starck Inc. - Newton MA

B22F 920

75351, 75363, 75369, 4235921, 423606, 423610

High purity refractory metals, valve metals, refractory metal oxides, valve metal oxides, or alloys thereof suitable for a variety of electrical, optical and mill product/fabricated parts usages are produced from their respective oxides by metalothermic reduction of a solid or liquid form of such oxide using a reducing agent that establishes (after ignition) a highly exothermic reaction, the reaction preferably taking place in a continuously or step-wise moving oxide such as gravity fall with metal retrievable at the bottom and an oxide of the reducing agent being removable as a gas or in other convenient form and unreacted reducing agent derivatives being removable by leaching or like process.

6927967, Aug 9, 2005

Dec 17, 2002

10/321861

Terrance B. Tripp - Westborough MA, US

H. C. Starck Inc. - Newton MA

H01G009/145

361508, 361502, 361504, 361509, 361512, 361523, 361528, 29 2503

Electrolytic capacitor powder substrates are provided of refractory metal nitrides to reduce instability at a substrate-oxide (as formed) interface whereby the resultant capacitor sensitivity to hear, bias and frequency is reduced.

4957541, Sep 18, 1990

Nov 1, 1988

7/265498

Terrance B. Tripp - Westboro MA
Richard W. Hildreth - Holliston MA

NRC, Inc. - Newton MA

B22F 924

75245

Tantalum powders of capacitor grade are provided, containing interacting silicon and phosphorous dopants to effect low D. C. leakage of electrolytic capacitors having anodes made from such powders, with anodic formation at low temperatures (40. degree. -60. degree. C. ), consistent with high capacitance.

5470525, Nov 28, 1995

Jul 1, 1994

8/269580

Terrance B. Tripp - Westboro MA
Malcolm Shaw - Medfield MA

H. C. Starck, Inc. - Newton MA

B22F 100

419 36

Tantalum anode pellets or tantalum powders are treated to remove carbon content (mostly attributable to binders used in pressing the powders to pellet form and/or sintering of the pellets) by an aqueous leach at 50. degree. -200. degree. F. in lieu of the conventional complex distillation/decomposition methods.