Patents by Inventor John H. Olmsted

John H. Olmsted 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).

  • Method of removing adsorbent contaminants from electrical apparatus
    Patent number: 4483717
    Abstract: A novel process for the removal of Polychlorinated Biphenyls (PCBs) and other adsorbed material from electrical apparatus to limit residual contamination to be less than a predetermined level; the process includes the steps for removal of the bulk fluid, subsequent solvent wash, repeated contact with penetrating solvent vapor, and cooling solvent soaks, with continuous solvent recovery.
    Type: Grant
    Filed: October 8, 1981
    Date of Patent: November 20, 1984
    Inventors: John H. Olmsted, Gary F. Lapp, Jerry Tappa
  • Protective container
    Patent number: 4361232
    Abstract: A transportable container for hazardous bulk materials which minimizes the risks of accidental spillage, comprising a closed, transportable weatherproof structure, formed by a solid walled pan and an overlapped protective cover, positioned on a pallet and surrounding two or more separate sealed containers of said material.
    Type: Grant
    Filed: December 19, 1979
    Date of Patent: November 30, 1982
    Inventor: John H. Olmsted
  • Hydrocarbon electrical insulation oil containing tri-cresyl phosphate to increase water retention capability
    Patent number: 4321424
    Abstract: An oil capable of use in environments where the accumulation of water is detrimental to the intended use, the oil consisting of branched and straight chain aliphatic hydrocarbons and minor amounts of tri-cresyl phosphate.
    Type: Grant
    Filed: March 31, 1978
    Date of Patent: March 23, 1982
    Assignee: RTE Corporation
    Inventor: John H. Olmsted
  • High fire point dielectric insulating fluid having a flat molecular weight distribution curve
    Patent number: 4284522
    Abstract: A liquid composition and method for forming the composition, the composition being intended for use in an oil-filled electrical apparatus to minimize the detrimental effects that can occur during high fault conditions which oil composition is biodegradable and formed from natural hydrocarbons and synthetic hydrocarbons which when combined form a flat pseudo-rectangular molecular weight distribution curve.
    Type: Grant
    Filed: February 27, 1979
    Date of Patent: August 18, 1981
    Assignee: RTE Corporation
    Inventor: John H. Olmsted