Patents by Inventor Alfred C. Christoffer

Alfred C. Christoffer 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).

  • Publication number: 20150069313
    Abstract: A metal safety rail for open floors of a building under construction includes a baseplate secured to a floor surface, a substantially vertical inner stanchion integrally joined to the baseplate, a substantially vertical outer stanchion slidably disposed over the inner stanchion, and at least one guard member secured to adjacent outer stanchions, whereby a safety rail is ultimately disposed about a peripheral portion of an open floor of a building under construction to prevent workers from falling from the open floor to the ground below.
    Type: Application
    Filed: November 21, 2014
    Publication date: March 12, 2015
    Inventors: Alfred C. Christoffer, Steve M. Stawychny
  • Patent number: 8925904
    Abstract: A metal safety rail for open floors of a building under construction includes a baseplate secured to a floor surface, a substantially vertical inner stanchion integrally joined to the baseplate, a substantially vertical outer stanchion slidably disposed over the inner stanchion, and at least one guard member secured to adjacent outer stanchions, whereby a safety rail is ultimately disposed about a peripheral portion of an open floor of a building under construction to prevent workers from falling from the open floor to the ground below.
    Type: Grant
    Filed: April 15, 2013
    Date of Patent: January 6, 2015
    Inventors: Alfred C. Christoffer, Steve M. Stawychny
  • Publication number: 20140191172
    Abstract: A metal safety rail for open floors of a building under construction includes a baseplate secured to a floor surface, a substantially vertical inner stanchion integrally joined to the baseplate, a substantially vertical outer stanchion slidably disposed over the inner stanchion, and at least one guard member secured to adjacent outer stanchions, whereby a safety rail is ultimately disposed about a peripheral portion of an open floor of a building under construction to prevent workers from falling from the open floor to the ground below.
    Type: Application
    Filed: April 15, 2013
    Publication date: July 10, 2014
    Inventors: Alfred C. Christoffer, Steve M. Stawychny
  • Patent number: 8424851
    Abstract: A metal safety rail for open floors of a building under construction includes a baseplate secured to a floor surface, a substantially vertical inner stanchion integrally joined to the baseplate, a substantially vertical outer stanchion slidably disposed over the inner stanchion, and at least one guard member secured to adjacent outer stanchions, whereby a safety rail is ultimately disposed about a peripheral portion of an open floor of a building under construction to prevent workers from falling from the open floor to the ground below.
    Type: Grant
    Filed: July 24, 2009
    Date of Patent: April 23, 2013
    Inventors: Alfred C. Christoffer, Steve M. Stawychny
  • Publication number: 20110017968
    Abstract: A metal safety rail for open floors of a building under construction includes a baseplate 12 secured to a floor surface 14, a substantially vertical inner stanchion 16 integrally joined to the baseplate 12, a substantially vertical outer stanchion 18 slidably disposed over the inner stanchion 16, and at least one guard member 20 secured to adjacent outer stanchions 18, whereby a safety rail is ultimately disposed about a peripheral portion of an open floor of a building under construction to prevent workers from falling from the open floor to the ground below.
    Type: Application
    Filed: July 24, 2009
    Publication date: January 27, 2011
    Inventors: Alfred C. Christoffer, Steve M. Stawychny