Patents by Inventor David A. Mortimer

David A. Mortimer 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).

  • Biodegradability of antiscalant formulations
    Patent number: 9080136
    Abstract: Anionic polymers comprising. organic counterfoils exhibit improved biodegradability. The anionic polymers are useful as antiscalants. The biodegradability of an anionic polymer may be improved by replacing inorganic counterions with organic counterions.
    Type: Grant
    Filed: December 19, 2006
    Date of Patent: July 14, 2015
    Assignee: Kemira OYJ
    Inventors: David A. Mortimer, Robert J. Jackson, Sun-Yi Huang
  • Improved Biodegradability of Antiscalant Formulations
    Publication number: 20090048142
    Abstract: Anionic polymers comprising. organic counterfoils exhibit improved biodegradability. The anionic polymers are useful as antiscalants. The biodegradability of an anionic polymer may be improved by replacing inorganic counterions with organic counterions.
    Type: Application
    Filed: December 19, 2006
    Publication date: February 19, 2009
    Inventors: David A. Mortimer, Robert J. Jackson, Sun-Yi Huang
  • Floating antenna system
    Patent number: 5406294
    Abstract: A floating antenna system which can be deployed and retrieved by an underwater diver is equipped with a pressure proof radome atop an elongated support stalk carrying a lobed, inverted pyramidoidal flotation collar below the radome which can be folded and wrapped transversely around the support stalk like an umbrella when deflated. The air supply for inflation is carried in a pressurized canister inside the support stalk. The collar is inflated via an inflation line from the canister controlled be a manually operated pushbutton valve. The antenna inside the radome is connected to a long tether cable which can be connected to a separate receiver or transmitter below the surface. The tether cable can be manipulated to control deployment and retrieval of the floating antenna.
    Type: Grant
    Filed: May 13, 1993
    Date of Patent: April 11, 1995
    Assignee: Spears Associates, Inc.
    Inventors: Trevor Silvey, Roy F. J. Orwell, David A. Mortimer