Patents by Inventor Alain L. Lenack

Alain L. Lenack 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).

  • Pavement binder and method of making same (LAW441)
    Patent number: 5637141
    Abstract: The present invention provides a method of making storage-stable road paving binders by blending a minor amount of an unsaturated polymer (e.g., having at least one diene monomer) with a major amount of asphalt at an elevated temperature such that the components are sufficiently fluid to blend; treating the asphalt-polymer blend with a sulfonating agent; and stripping the treated asphalt-polymer blend at an elevated temperature with sufficient stripping gas to remove strippable sulfur moieties and to stabilize the resulting stripped, treated blend. The invention also provides asphaltic compositions made by the method. The asphaltic compositions are useful as binders in road paving applications.
    Type: Grant
    Filed: June 18, 1996
    Date of Patent: June 10, 1997
    Assignee: Exxon Research & Engineering Company
    Inventors: Olga Puzic, Larry J. Evers, Kenneth E. Williamson, Martin L. Gorbaty, Nicholas C. Nahas, Alain L. Lenack
  • Calcium sulphonate process
    Patent number: 4387033
    Abstract: In producing basic Calcium Sulphonate by carbonating mixtures of sulphonic acids, calcium hydroxide, alcohols and toluene the use of a narrowly defined temperature profile during carbonation enables product of improved oil solubility and viscosity to be obtained as well as leading to improved filterability.
    Type: Grant
    Filed: August 18, 1981
    Date of Patent: June 7, 1983
    Assignee: Exxon Research & Engineering Co.
    Inventors: Alain L. Lenack, Robert Tirtiaux