Patents by Inventor Darryl R. T. Smith

Darryl R. T. Smith 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).

  • Fuel oil additive and compositions
    Patent number: 5423890
    Abstract: Compositions comprising an ethylene-.alpha.-olefin copolymer, an ethylene-unsaturated ester copolymer, and a comb polymer improve the low temperature properties of fuel oils, especially high wax content oils.
    Type: Grant
    Filed: December 9, 1992
    Date of Patent: June 13, 1995
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Iain More, Wayne M. Camarco, Darryl R. T. Smith
  • Fuel oil additives
    Patent number: 5364419
    Abstract: A liquid hydrocarbon particularly fuel oil containing an amine-salt having the formula ##STR1## wherein R, R.sup.1 and R.sup.2 are hydrogen or a hydrogen - and carbon-containing group;R.sup.3 and R.sup.4 are hydrogen or hydrogen - and carbon containing groups containing at least 12 carbon atom;R.sup.5 is a hyrdrogen-and carbon-containing group containing at least 12 carbon atoms;X is --OR.sup.6, NR.sup.7 R.sup.8 or [--O].sup.-+ [NHR.sup.9 R.sup.10 R.sup.11 ] and Y is --OR.sup.12, NR.sup.13 R.sup.14 or [--O].sup.-+ [NHR.sup.15 R.sup.16 R.sup.17 ]where R.sup.6, R.sup.7, R.sup.8, R.sup.9, R.sup.10, R.sup.13, R.sup.14, R.sup.15 and R.sup.16 are hydrogen or hydrogen and carbon containing groups, and R.sup.11 and R.sup.17 are hydrogen - and carbon containing groups; provided that R.sup.3, R.sup.4 and R.sup.5 cannot all be alkyl groups.
    Type: Grant
    Filed: September 17, 1993
    Date of Patent: November 15, 1994
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Robert D. Tack, Darryl R. T. Smith, David P. Gillingham