Patents by Inventor Harold R. MacKeighen

Harold R. MacKeighen 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).

  • Elastomer compositions containing humates
    Patent number: 4600728
    Abstract: Elastomer compositions are provided which contain high molecular weight water-insoluble humic acid humates. The compositions show improved bloom resistance in both the uncured and the vulcanized or otherwise cured state. Methods to make sponge rubber are also disclosed in which the humic acid humate is the gas producing agent. A predominantly humic acid humate containing composition maintains a clean mold, and curing an uncured article coated with the humate at elevated temperature will clean metal molds which have dirty surfaces, particularly when green coated articles are vulcanized in contact with the mold's surfaces.
    Type: Grant
    Filed: July 24, 1985
    Date of Patent: July 15, 1986
    Assignee: Alfred D. Lobo Co., L.P.A.
    Inventors: Harold R. MacKeighen, Vincent T. Cortesi
  • Elastomer compositions containing humates
    Patent number: 4532260
    Abstract: Elastomer compositions are provided which contain high molecular weight water-insoluble humic acid humates. The compositions show improved bloom resistance in both the uncured and the vulcanized or otherwise cured state. Methods to make sponge rubber are also disclosed in which the humic acid humate is the gas producing agent. A predominantly humic acid humate containing composition maintains a clean mold, and curing an uncured article coated with the humate at elevated temperature will clean metal molds which have dirty surfaces, particularly when green coated articles are vulcanized in contact with the mold's surfaces.
    Type: Grant
    Filed: October 18, 1984
    Date of Patent: July 30, 1985
    Assignee: Alfred D. Lobo Co., L.P.A.
    Inventors: Harold R. MacKeighen, Vincent T. Cortesi