Patents by Inventor William Henry Mapes, III

William Henry Mapes, III 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 for repairing HFC refrigerant system
    Patent number: 5946921
    Abstract: A combination of a chemical filter and a molecular sieve desiccant dryer are provided in the liquid line of the refrigeration system in a refrigerator which contains a chlorine-free hydrofluorocarbon refrigerant and a hygroscopic polyol ester compressor lubricant after a repair is made to the system and before it is recharged with fresh refrigerant. The chemical filter, such as activated alumina, filters out hydrolysis products of the lubricant and moisture which block the capillary tube, and the dryer removes moisture from system.
    Type: Grant
    Filed: August 22, 1995
    Date of Patent: September 7, 1999
    Assignee: General Electric Company
    Inventors: William Henry Mapes, III, John Joseph Hellmueller, Jr., Joseph B. Hofelich