Patents by Inventor Frederick John Bird

Frederick John Bird 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 and reagent kit for determining paper degredation in transformers
    Patent number: 5646047
    Abstract: This invention relates to power transformers. More particularly, this invention pertains to a method and apparatus for detecting the degree of degradation of paper insulation in a transformer by determining the concentration of furaldehyde in the transformer oil. A reagent for detecting the presence of furaldehyde in transformer oil comprising: (a) a primary amine selected from the group consisting of aniline, toluidine, anisidine, aminophenol or an amine; (b) a second component having about 3 mL of about 15 to 33 (weight to volume) percent of acetic acid alone, or in combination with citric acid; from about 67 to 85 (volume) percent of a halogenated hydrocarbon selected from the group consisting of dichloromethane, chloroform, carbontetrachloride, dichloroethane, trichloroethane, tetrachloroethane, trichloroethylene, tetrachloroethylene; about 4 (weight to volume) percent of salicylic acid; and about 1 (weight to volume) percent of an anti-oxidant; and (c) a third component having about 1.
    Type: Grant
    Filed: December 20, 1995
    Date of Patent: July 8, 1997
    Assignee: Powertech Labs Inc.
    Inventors: Frederick John Bird, Nicola Dominelli, Gordon R. Ashby