Patents by Inventor Calvin Johnson

Calvin Johnson 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).

  • GRAPPLE SAW
    Publication number: 20070215247
    Abstract: A grapple saw includes grapple having downwardly-extending jaws for holding a log therebetween, the jaws moveable between an open position and a closed position in a gripping direction; and a saw carried by the grapple, the saw having a blade moveable between starting and ending positions in a cutting plane generally parallel to the gripping direction, so as to sever a log held in the jaws. The ending position of the saw blade is substantially horizontal, so as to prevent twisting of a free end of the severed log relative to the grapple.
    Type: Application
    Filed: March 17, 2006
    Publication date: September 20, 2007
    Inventor: Calvin Johnson
  • Ambient temperature curing, high carbon contributing compositions
    Patent number: 5043412
    Abstract: A raw batch composition for use in making a shaped article such as a foundry shape or refractory article is disclosed. The composition comprises a mixture of an aggregate material; a phenol formaldehyde novolak resin; a phenol formaldehyde resole resin; and an ester functional curing agent. A shaped article prepared from the composition and processes for making a refractory body or foundry article are also disclosed.
    Type: Grant
    Filed: September 1, 1989
    Date of Patent: August 27, 1991
    Assignee: Borden, Inc.
    Inventors: Pitchaiya Chandramouli, Raja Iyer, Calvin Johnson