Patents by Inventor Sylvain Brunel

Sylvain Brunel 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).

  • Surface-active compounds of the sulfobetaines family, their manufacture and use, particularly for enhanced oil recovery
    Patent number: 4704229
    Abstract: New surface-active compounds of the sulfobetaines group are manufactured. They comply with the general formula: ##STR1## wherein each of R.sub.1, R.sub.2 and R.sub.3 is substantially a hydrocarbon radical, each of R.sub.4 and R.sub.5 is a hydrogen atom or substantially a hydrocarbon radical and R.sub.6 is a hydrogen atom or a hydrocarbon radical, R.sub.1 to R.sub.6 radicals containing together from 12 to 30 carbon atoms, n is an integer equal to 2 to 3, Z may be a CH.sub.3 radical or a hydroxy group, p may be 0 or 1 with, when Z is a hydroxy group and p is equal to 1, a value of 1 for m and for q; when Z is a methyl radical, with a value of 1 for p, a value of 2 for m and a value of 0 or 1 for q and, when p=0, a value of 2, 3 or 4 for the sum (m+q).These new surfactants are useful in enhanced oil recovery as micellar systems consisting of aqueous solutions and microemulsions.
    Type: Grant
    Filed: August 20, 1985
    Date of Patent: November 3, 1987
    Assignees: Institut Francais du Petrole, Centre National de la Recherche Scientifique
    Inventors: Sylvain Brunel, Laurent Germanaud, Pierre Le Perchec, Bernard Sillion