Patents by Inventor Marcel Robert

Marcel Robert 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).

  • Alkylaryl sulphonic acids
    Patent number: 4172844
    Abstract: The development of color of a concentrate of alkarylsulphonic acids is reduced by adding to and dissolving in the freshly prepared concentrate up to 5% of its weight of an organic compound having at least one ether group therein, the partial vapor pressure of the compound thus dissolved in the concentrate being negligible at the temperatures at which the concentrate is stored or transported. Examples of suitable organic compounds are aliphatic or phenolic monoethers, e.g. diethylene glycol.
    Type: Grant
    Filed: March 11, 1975
    Date of Patent: October 30, 1979
    Assignee: Exxon Research & Engineering Co.
    Inventors: Marcel Prillieux, Marcel Robert, Robert Tirtiaux
  • Hydrogenated olefine oligomers
    Patent number: 4078010
    Abstract: Oligomerizing propylene using a Friedel Crafts catalyst at a temperature in the range -10.degree. to 80.degree. C and hydrogenating the oligomer so obtained to produce oils useful as hydraulic fluids.
    Type: Grant
    Filed: July 11, 1975
    Date of Patent: March 7, 1978
    Assignee: Exxon Research & Engineering Co.
    Inventors: Marcel Prillieux, Marcel Robert, Robert Tirtiaux
  • Blends of hydrogenated oligomers of cyclopentadienes and paraffinic oils
    Patent number: 4023980
    Abstract: Blends of paraffinic oils and hydrogenated polycyclopentadiene or polymethylcyclopentadiene.
    Type: Grant
    Filed: July 11, 1975
    Date of Patent: May 17, 1977
    Assignee: Exxon Research and Engineering Company
    Inventors: Marcel Prillieux, Marcel Robert, Robert Tirtiaux
  • Oligomerization of propylene
    Patent number: 3932553
    Abstract: Propylene is oligomerised in the presence of a boron trifluoride catalyst and a small amount of a reagent which reduces the activity of the catalyst, thereby resulting in a reduction of the average molecular weight of the oligomerisation product. Butadiene is one said reagent.
    Type: Grant
    Filed: July 26, 1974
    Date of Patent: January 13, 1976
    Assignee: Exxon Research and Engineering Company
    Inventor: Marcel Robert