Patents by Inventor Malcolm Shaw

Malcolm Shaw has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Removal of binder from Ta products
    Patent number: 5470525
    Abstract: 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.
    Type: Grant
    Filed: July 1, 1994
    Date of Patent: November 28, 1995
    Assignee: H. C. Starck, Inc.
    Inventors: Terrance B. Tripp, Malcolm Shaw
  • Tantalum production via a reduction of K2TAF7, with diluent salt, with reducing agent provided in a fast series of slug additions
    Patent number: 5442978
    Abstract: 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.
    Type: Grant
    Filed: May 19, 1994
    Date of Patent: August 22, 1995
    Assignee: H. C. Starck, Inc.
    Inventors: Richard Hildreth, Malcolm Shaw, Terrance B. Tripp, Leo G. Gibbons
  • Fabric softening composition and a process for preparing it from cationic surfactant and thickener
    Patent number: 4379059
    Abstract: A rinse conditioner containing cationic surfactant and optionally other surfactants or fatty materials is prepared to relatively high viscosity at which it is stable. The process step necessary to achieve this is first to prepare a relatively mobile dispersion of the active materials and to thicken this mobile dispersion with a nonionic or weakly anionic thickener. Examples of such thickeners are guar gum, polyvinylacetate and polyacrylamide.
    Type: Grant
    Filed: November 5, 1981
    Date of Patent: April 5, 1983
    Assignee: Lever Brothers Company
    Inventors: John A. Hockey, Malcolm A. Shaw, John L. Wilby, Allan A. Wilson