Patents by Inventor Mark Rees

Mark Rees 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).

  • Modified dispersant compositions
    Patent number: 5505868
    Abstract: An oil soluble dispersant composition formed by reacting a basic nitrogen-containing ashless dispersant (i) with at least one dibasic acylating agent, (ii) with at least one phosphorus compound, and (iii) with at least one boron compound, said reactions (i), (ii) and (iii) being conducted concurrently or sequentially in any order such that the initial ashless dispersant is chemically modified via acylation in (i), by phosphorylation in (ii), and by boronation in (iii).
    Type: Grant
    Filed: October 6, 1992
    Date of Patent: April 9, 1996
    Assignee: Ethyl Petroleum Additives Limited
    Inventors: Helen T. Ryan, Roger Scattergood, Mark Rees