Patents by Inventor Jenefir D. Isbister

Jenefir D. Isbister 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).

  • Biological assay for microbial contamination
    Patent number: 5935799
    Abstract: A semi-quantitative method for determining the concentration of viable coliforms or E. coli in a liquid is provided. The sample to be tested is mixed with an indicator reagent which includes a specific indicator compound that undergoes a change that is detectable by spectrophotometric or visual methods upon cleavage by a beta galactosidase enzyme found in coliforms or a beta glucuronidase enzyme unique to E. coli.
    Type: Grant
    Filed: December 10, 1997
    Date of Patent: August 10, 1999
    Assignee: George Mason University
    Inventor: Jenefir D. Isbister
  • Biological assay for microbial contamination
    Patent number: 5770395
    Abstract: Methods and kits for detecting the presence of and quantifying the concentration of viable microorganisms in a liquid sample are provided. Enzymes present in viable microorgansims reduce an indicator reagent to produce a visible color change. No titrations or dilutions of the sample are necessary. Variations of the test are described which can be used to detect a threshold level of viable microorganisms, to detect the presence or absence of viable microorganisms and to quantify the concentration of viable microorganisms in a liquid sample. The results are obtained rapidly with those for the detection available within thirty minutes and those for the quantification available within thirteen hours.
    Type: Grant
    Filed: June 18, 1996
    Date of Patent: June 23, 1998
    Assignee: Center for Innovative Technology
    Inventor: Jenefir D. Isbister
  • Biological assay for microbial contamination
    Patent number: 5550032
    Abstract: Methods and kits for detecting the presence of and quantifying the concentration of viable microorganisms in a liquid sample are provided. Enzymes present in viable microorgansims reduce an indicator reagent to produce a visible color change. No titrations or dilutions of the sample are necessary. Variations of the test are described which can be used to detect a threshold level of viable microorganisms, to detect the presence or absence of viable microorganisms and to quantify the concentration of viable microorganisms in a liquid sample. The results are obtained rapidly with those for the detection available within thirty minutes and those for the quantification available within thirteen hours.
    Type: Grant
    Filed: May 27, 1994
    Date of Patent: August 27, 1996
    Assignee: George Mason University
    Inventor: Jenefir D. Isbister
  • Acinetobacter species and its use in removing organic sulfur compounds
    Patent number: 4808535
    Abstract: A novel mutant microorganism Acinetobacter species CB2 having a registry number ATCC #53515 has been produced by chemical mutagenesis and is effective in removing organic sulfur compounds from carbonaceous materials such as fossil fuels e.g., coal, petroleum and petroleum products.
    Type: Grant
    Filed: August 5, 1986
    Date of Patent: February 28, 1989
    Assignee: Atlantic Research Corporation
    Inventor: Jenefir D. Isbister
  • Mutant microorganism and its use in removing organic sulfur compounds
    Patent number: 4562156
    Abstract: A novel mutant microorganism Pseudomonas sp. CB1 having a registry number ATCC 39381 has been produced by chemical mutagenesis and is effective in removing organic sulfur compounds from carbonaceous materials such as fossil fuels e.g., coal, petroleum and petroleum products.
    Type: Grant
    Filed: July 11, 1983
    Date of Patent: December 31, 1985
    Assignee: Atlantic Research Corporation
    Inventors: Jenefir D. Isbister, Richard C. Doyle