Patents by Inventor Rachel Evelyn Mary Kenward

Rachel Evelyn Mary Kenward 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).

  • Patent number: 5667539
    Abstract: Compounds of the formula I below are useful as additives in oleaginous compositions: ##STR1## wherein B represents an aromatic system, A represents a hydrocarbyl group, R.sup.1 and R.sup.2 are the same or are different and each independently is an aliphatic hydrocarbyl group containing 10-40 carbon atoms, provided that one of R.sup.1 and R.sup.2 may represent hydrogen; z is at least 1 and wherein the aromatic system carries at least one substituent group which is an activating group for the ring system or a derivative of an activating group.
    Type: Grant
    Filed: August 7, 1996
    Date of Patent: September 16, 1997
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Graham Jackson, Rachel Evelyn Mary Kenward, Barbara Catherine Brooke