Patents by Inventor David J. Fisher

David J. Fisher 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).

  • Publication number: 20030191984
    Abstract: A data processing arrangement (100) and method for fuzzy backup and restore of MQSeries shared queues held in coupling facility list structure (106). Periodically backups are taken of the data held in the CF list structure by backing up messages in the sequence uncommitted puts (220), committed puts (230), uncommitted gets (240) and expired messages (250), whereby all messages may be backed up in the backup means except for exceptions which are recorded in the record log. In the event of media failure of the coupling facility, data can be restored by restoring messages in the sequence restoring messages from the backup means (320), replaying messages from the record log means (340) and determining final disposition of messages from replay of the record log means (350). This provides the advantage of allowing the number of log records written to be reduced.
    Type: Application
    Filed: August 27, 2002
    Publication date: October 9, 2003
    Applicant: International Business Machines Corporation
    Inventors: Dermot Flaherty, David J. Fisher, Stephen J. Hobson, Paul Hopewell, Paul Kettley, Robert D. Millar, Peter Siddall, Stephen R. Walker
  • Publication number: 20030191918
    Abstract: A data processing system (100) and method for creating a fuzzy backup (116) only of objects older than a predetermined threshold, and restoring from the fuzzy backup and from a record log (114) replayed from a time equal to the predetermined threshold before the fuzzy backup start time.
    Type: Application
    Filed: August 27, 2002
    Publication date: October 9, 2003
    Applicant: International Business Machines Corporation
    Inventors: Dermot Flaherty, David J. Fisher, Stephen J. Hobson, Paul Hopewell, Paul Kettley, Robert D. Millar, Peter Siddall, Stephen R. Walker
  • Patent number: 5200149
    Abstract: A chemical test kit and method for detecting the presence of impurities in an oil sample is provided. The test kit is comprised of two flexible translucent or transparent containers, each with at least one breakable capsule mounted within it. One of the flexible containers has a means for separating an aqueous layer from an oil layer. The capsules contain reagents capable of extracting the impurity to be detected from the oil into an aqueous layer and indicating the presence of a threshold concentration of the impurity. The method involves the steps of introducing an oil sample into a first flexible container, breaking the capsule within it by squeezing the flexible container in the vicinity of the capsule, transferring the aqueous layer to the second container, and breaking the capsule within the second container in the same manner. A chemical reaction occurs in the second container indicating whether the impurity is present at a given threshold concentration.
    Type: Grant
    Filed: July 18, 1990
    Date of Patent: April 6, 1993
    Assignee: Electric Power Research Institute, Inc.
    Inventor: David J. Fisher
  • Patent number: 5028543
    Abstract: A method for measuring the halogenated organic compound content, e.g., polychlorinated biphenyl ("PCB") content, of soil samples may effectively be carried out with an inexpensive, disposable (that is, single-use) field test kit. The method includes contacting a weighted soil sample suspected of containing PCB or some other organohalogen contaminant with a pre-mixture of water and an organic solvent in which water is slightly soluble. The water extracts any inorganic halides which may be present and would adversely affect the accuracy of the test. The organic solvent wets the moist soil sample sufficiently to extract any PCB therein. The resultant organic solvent phase is separated from the soil sample and aqueous phase, dried by passage through a moisture-adsorbent material to remove or at least greatly reduce its moisture content, and analyzed by means of a color-change titration to determine halide content, and thereby the PCB (or other organohalogen) content, of the soil sample.
    Type: Grant
    Filed: April 4, 1990
    Date of Patent: July 2, 1991
    Assignee: Dexsil Corporation
    Inventors: Stephen R. Finch, David J. Fisher
  • Patent number: 4957871
    Abstract: Method for dectecting the presence of impurities in an oil sample is provided. The method involves the steps of introducing an oil sample into a first flexible container, breaking the capsule within it by squeezing the flexible container in the vicinity of the capsule, transferring the aqueous layer to the second container, and breaking the capsule within the second container in the same manner. A chemical reaction occurs in the second container indicating whether the impurity is present at a given threshold concentration.
    Type: Grant
    Filed: June 22, 1989
    Date of Patent: September 18, 1990
    Assignee: Electric Power Research Institute, Inc.
    Inventor: David J. Fisher
  • Patent number: 4873056
    Abstract: A chemical test kit and method for detecting the presence of impurities in an oil sample is provided. The test kit is comprised of two flexible translucent or transparent containers, each with at least one breakable capsule mounted within it. One of the flexible containers has a means for separating an aqueous layer from an oil layer. The capsules contain reagents capable of extracting the impurity to be detected from the oil into an aqueous layer and indicating the presence of a threshold concentration of the impurity. The method involves the steps of introducing an oil sample into a first flexible container, breaking the capsule within it by squeezing the flexible container in the vicinity of the capsule, transferring the aqueous layer to the second container, and breaking the capsule within the second container in the same manner. A chemical reaction occurs in the second container indicating whether the impurity is present at a given threshold concentration.
    Type: Grant
    Filed: May 15, 1987
    Date of Patent: October 10, 1989
    Assignee: Electric Power Research Institute, Inc.
    Inventor: David J. Fisher
  • Patent number: 4686192
    Abstract: A chemical test kit and method for detecting the presence of impurities in an oil sample is provided. The test kit is comprised of two flexible translucent or transparent containers, each with at least one breakable capsule mounted within it. One of the flexible containers has a means for separating an aqueous layer from an oil layer. The capsules contain reagents capable of extracting the impurity to be detected from the oil into an aqueous layer and indicating the presence of a threshold concentration of the impurity. The method involves the steps of introducing an oil sample into a first flexible container, breaking the capsule within it by squeezing the flexible container in the vicinity of the capsule, transferring the aqueous layer to the second container, and breaking the capsule within the second container in the same manner. A chemical reaction occurs in the second container indicating whether the impurity is present at a given threshold concentration.
    Type: Grant
    Filed: September 2, 1983
    Date of Patent: August 11, 1987
    Assignee: Electric Power Research Institute, Inc.
    Inventor: David J. Fisher
  • Patent number: 4587834
    Abstract: Automated gas chromatographic apparatus is utilized to analyze various gases dissolved in the insulating oil of an oil-filled power transformer in an expeditious and reliable manner. A sample of the insulating oil is introduced into a sample loop via a sampling valve, from which it is propelled by an inert carrier gas into a degassing chamber comprised of a vertically oriented tube packed with spherical packing elements. The carrier gas sweeping upwardly through this tube strips the various gases out of solution for conveyance by the carrier gas in plug flow fashion to a gas chromatograph where the stripped gases are separated and individually analyzed.
    Type: Grant
    Filed: March 7, 1985
    Date of Patent: May 13, 1986
    Assignee: General Electric Company
    Inventor: David J. Fisher
  • Patent number: D262535
    Type: Grant
    Filed: August 17, 1979
    Date of Patent: January 5, 1982
    Inventor: David J. Fisher