Patents by Inventor Frederic Couffin

Frederic Couffin 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).

  • Patent number: 4671947
    Abstract: A novel sodium orthophosphate has the formula Na.sub.5 H.sub.4 (PO.sub.4).sub.3 wherein the Na/P ratio thereof is essentially 5/3, and which is characterized by but a single crystalline phase and a characteristic X-ray diffraction pattern.
    Type: Grant
    Filed: December 27, 1985
    Date of Patent: June 9, 1987
    Assignee: Rhone-Poulenc Industries
    Inventors: Jean-Paul Bourgeois, Frederic Couffin, Claude Magnier
  • Patent number: 4671948
    Abstract: A novel anhydrous sodium tripolyphosphate, well adapted for detergency applications, has an X-ray diffraction pattern essentially characterizing a phase I sodium tripolyphosphate; a viscosity, in aqueous medium, characterizing a phase II sodium tripolyphosphate; a rate of hydration characterizing a phase I sodium tripolyphosphate; and which exhibits an ROH at 1 minute of greater than about 90.degree. C.
    Type: Grant
    Filed: January 24, 1986
    Date of Patent: June 9, 1987
    Assignee: Rhone-Poulenc Chimie de Base
    Inventors: Frederic Couffin, Claude Magnier
  • Patent number: 4671949
    Abstract: A novel anhydrous sodium tripolyphosphate, well adapted as an additive for foodstuffs and detergent compositions, has an Na/P ratio of essentially 1.667.+-.0.01, an apparent density of from 0.5 to 1.1, a mean agglomerate size of less than 100 microns, a phase I content ranging from 15 to 6% by weight, is devoid of insoluble fraction, and displays zero solidification or caking in a quiescent solvent medium.
    Type: Grant
    Filed: December 27, 1985
    Date of Patent: June 9, 1987
    Assignee: Rhone-Poulenc Industries
    Inventors: Jean-Paul Bourgeois, Frederic Couffin, Claude Magnier