Patents by Inventor Johnnie E. Adams

Johnnie E. Adams 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).

  • Bismaleimide compounds
    Patent number: 4564683
    Abstract: Bismaleimides of the formula ##STR1## wherein R.sub.1 and R.sub.2 each independently is H, C.sub.1-4 -alkyl, C.sub.1-4 -alkoxy, C1 or Br, orR.sub.1 and R.sub.2 together form a fused 6-membered hydrocarbon aromatic ring,with the proviso that R.sub.1 and R.sub.2 are not t-butyl or t-butoxy;X is O, S or Se;n is 1-3; andthe alkylene bridging group, optionally, is substituted by 1-3 methyl groups or by fluorine,form polybismaleimide resins which have valuable physical properties.Uniquely, these compounds permit extended cure times, i.e., they remain fluid for a time sufficient to permit the formation of a homogeneous melt prior to curing.
    Type: Grant
    Filed: April 10, 1984
    Date of Patent: January 14, 1986
    Assignee: The United States of America as Represented by the United States Department of Energy
    Inventors: Johnnie E. Adams, Donald R. Jamieson
  • Delayed cure bismaleimide resins
    Patent number: 4464520
    Abstract: Polybismaleimides prepared by delayed curing of bis-imides having the formula ##STR1## wherein R.sub.1 and R.sub.2 each independently is H, C.sub.1-4 -alkyl, C.sub.1-4 -alkoxy, Cl or Br, orR.sub.1 and R.sub.2 together form a fused 6-membered hydrocarbon aromatic ring, with the proviso that R.sub.1 and R.sub.2 are not t-butyl or t-butoxy;X is O, S or Se;n is 1-3; andthe --(CH.sub.2).sub.n -- group, optionally, is substituted by 1-3 methyl groups or by fluorine.
    Type: Grant
    Filed: August 12, 1982
    Date of Patent: August 7, 1984
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Johnnie E. Adams, Donald R. Jamieson