Patents by Inventor Remy Lorang

Remy Lorang 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).

  • Treatment process for titanium dioxide pigments, novel titanium dioxide pigment and its use in paper manufacture
    Patent number: 5942281
    Abstract: Process for the surface treatment of a titanium dioxide pigment, characterized in that it comprises the following steps:an aqueous suspension of titanium dioxide pigments is formed,in a first step, a layer of alumina phosphate is precipitated on the surface of the pigment,in a second step, a layer of alumina is precipitated over the first layer of alumina phosphate,the pigment is recovered from the suspension;and titanium dioxide pigment, characterized in that it comprises a titanium dioxide core coated successively with a layer of alumina phosphate, then with a layer of alumina and then with a layer of magnesium oxide.
    Type: Grant
    Filed: April 26, 1997
    Date of Patent: August 24, 1999
    Inventors: Anny Guez, Remy Lorang
  • Paper/paper laminate-opacifying TiO.sub.2 particulates
    Patent number: 5705033
    Abstract: Unique titanium dioxide (TiO.sub.2) particulates have an especially high physicochemical affinity for cellulosic fibers and, thus, are well suited as opacifying pigments for paper and paper laminates, and include a zeta potential-adjusting amount of at least one cationic polymer, e.g., a polymer of a quaternary ammonium, sulfonium or phosphonium salt or a copolymer of acrylamide with a cationic comonomer, fixed to the face surfaces thereof.
    Type: Grant
    Filed: December 30, 1992
    Date of Patent: January 6, 1998
    Assignee: Rhone-Poulenc Chimie
    Inventors: Bernard Gerard, Remy Lorang, Anny Mazzacavallo
  • Treatment process for titanium dioxide pigments, novel titanium dioxide pigment and its use in paper manufacture
    Patent number: 5665466
    Abstract: Process for the surface treatment of a titanium dioxide pigment, characterized in that it comprises the following steps:an aqueous suspension of titanium dioxide pigments is formed,in a first step, a layer of alumina phosphate is precipitated on the surface of the pigment,in a second step, a layer of alumina is precipitated over the first layer of alumina phosphate,the pigment is recovered from the suspension;and titanium dioxide pigment, characterized in that it comprises a titanium dioxide core coated successively with a layer of alumina phosphate, then with a layer of alumina and then with a layer of magnesium oxide.
    Type: Grant
    Filed: November 8, 1995
    Date of Patent: September 9, 1997
    Assignee: Rhone-Poulenc Chimie
    Inventors: Anny Guez, Remy Lorang