Patents by Inventor Donald M. Wreyford

Donald M. Wreyford 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).

  • Total sulfur analyzer system operative on sulfur/nitrogen mixtures
    Patent number: 5152963
    Abstract: A total sulfur analyzer system is set forth. The system operates with gas, liquid or solid samples including free sulfur, and sulfur and nitrogen compounds. The sample is first combusted to provide products of combustion including SO.sub.2 and NO. The SO.sub.2 quantity is measured by exposure to a particular frequency of ultraviolet light to obtain fluorescence, the fluorescent photons being measured by a photomultiplier tube (PMT). The system preferably includes suitable elecronics connected to the PMT for providing data of measurements of sulfur.
    Type: Grant
    Filed: August 17, 1987
    Date of Patent: October 6, 1992
    Inventor: Donald M. Wreyford