Switch Patents (Class 56/170)
Automatic control (Class 56/171)
  • Method for the production of expanded polymeric materials and expanded polymeric material obtained by the method
    Patent number: 7893123
    Abstract: A method for the production of expanded polymeric materials; in particular for producing thermally insulating materials used in refrigerators. The method comprising the steps of providing a mixture of reagents based on isocyanate and polyol with the addition of expandable polystyrene-based microspheres, in which method the ratio by weight between the reagents and the expandable microspheres is between, about 7:1 and about 1:2.
    Type: Grant
    Filed: March 21, 2006
    Date of Patent: February 22, 2011
    Assignee: Whirlpool Corporation
    Inventor: Armando Luisi
  • Process for the conversion of maleic acid derivatives to their corresponding fumaric isomers
    Patent number: H645
    Abstract: A process for the isomerization of maleic acid, its monoesters and monoamides in the presence of thiourea in anhydrous conditions at elevated temperature to the corresponding fumaryl forms yields intermediates which are useful in the synthetic pathways of aspartame and other useful polypeptides.
    Type: Grant
    Filed: July 16, 1987
    Date of Patent: June 6, 1989
    Assignee: The NutraSweet Company
    Inventor: Hugh L. Dryden, Jr.