Patents by Inventor Robert C. Plumb

Robert C. Plumb 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).

  • Label removal from phonograph record disks
    Patent number: 4322252
    Abstract: Method and apparatus for removing labels from an article such as a phonograph record, consisting of subjecting the article and label to the action of a solvent in a vapor-phase mode, and a liquid phase mode, passing the article through a drying space and subjecting the article to a blast of compressed air to blow off the label.
    Type: Grant
    Filed: June 19, 1980
    Date of Patent: March 30, 1982
    Inventor: Robert C. Plumb
  • Process for changing the morphology of metal sulfates
    Patent number: 4322397
    Abstract: Novel form of metal sulphate produced by alternate dehydration and rehydration, e.g., by cycling prismatic metal sulphate between 0.degree. C. and 70.degree. C., 20 minutes at each temperature, for 200 or more cycles, until a low-density powder is formed having a coral-like morphology at 8000 magnification.
    Type: Grant
    Filed: March 17, 1981
    Date of Patent: March 30, 1982
    Assignee: Worcester Polytechnic Institute
    Inventors: Robert C. Plumb, Rewat Tantayanon