Patents by Inventor John C. Purvis

John C. Purvis 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).

  • Pre-cast blocks for use in column construction
    Patent number: 8839593
    Abstract: A decorative column comprising a rigid center post, a plurality of pre-cast pieces with each piece having a hole extending therethrough so the pre-cast piece slides onto the center post and remains in place on the center post. Each pre-cast piece being stacked upon another pre-cast piece, the pre-cast pieces being of a predefined shape, and a compressible center core liner filling a portion of the hole of the pre-cast piece. The compressible center core including a cutout shape consistent with the cross sectional shape of the rigid center post thereby allowing passage of the center post through the compressible center core.
    Type: Grant
    Filed: February 17, 2011
    Date of Patent: September 23, 2014
    Assignee: Ply Gem Industries, Inc.
    Inventors: David Barrett, Derek Zimmerman, David Jacobson, Randy Quaintance, John C Purvis
  • Pre-Cast Blocks For Use In Column Construction
    Publication number: 20110283657
    Abstract: A decorative column comprising a rigid center post, a plurality of pre-cast pieces with each piece having a hole extending therethrough so the pre-cast piece slides onto the center post and remains in place on the center post. Each pre-cast piece being stacked upon another pre-cast piece, the pre-cast pieces being of a predefined shape, and a compressible center core liner filling a portion of the hole of the pre-cast piece. The compressible center core including a cutout shape consistent with the cross sectional shape of the rigid center post thereby allowing passage of the center post through the compressible center core.
    Type: Application
    Filed: February 17, 2011
    Publication date: November 24, 2011
    Inventors: David Barrett, Derek Zimmerman, David Jacobson, Randy Quaintance, John C. Purvis
  • Mat supported offshore structure
    Patent number: 7001108
    Abstract: A bottom-supported jack-up rig has a hollow ring mat with a central opening for accommodating a lower portion of a hull nested therein when the rig is in transit. The ring mat has a predetermined surface footprint sufficient to provide stability to the rig when embedded in the sea bottom. The mat buoyancy helps support the hull and the legs in a floating position when the rig is in transit, while allowing lowering of the mat to the sea bottom without assistance of a ballasting/de-ballasting means.
    Type: Grant
    Filed: June 24, 2003
    Date of Patent: February 21, 2006
    Inventors: John C. Purvis, Tak On Cheung
  • Mat supported offshore structure
    Publication number: 20040265069
    Abstract: A bottom-supported jack-up rig has a hollow ring mat with a central opening for accommodating a lower portion of a hull nested therein when the rig is in transit. The ring mat has a predetermined surface footprint sufficient to provide stability to the rig when embedded in the sea bottom. The mat buoyancy helps support the hull and the legs in a floating position when the rig is in transit, while allowing lowering of the mat to the sea bottom without assistance of a ballasting/de-ballasting means.
    Type: Application
    Filed: June 24, 2003
    Publication date: December 30, 2004
    Inventors: John C. Purvis, Tak On Cheung