Patents by Inventor Sidney Hopper

Sidney Hopper 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).

  • Encapsulant material suitable for use under conditions of prolonged vacuum
    Patent number: 4383099
    Abstract: An encapsulant material suitable for use in space applications a polyurethane having according to the ESTEC specification a total mass loss of not greater than 1% and condensible volatiles content of not greater than 0.1% combined with a vibration performance characterised by a Q of from 4 to 15 and a peak frequency of 200 to 400 Hz when vibrated at 1g.
    Type: Grant
    Filed: July 27, 1981
    Date of Patent: May 10, 1983
    Assignee: E M I Limited
    Inventors: Agathangelos Hajimichael, Sidney Hopper, Peter K. Smith