Patents by Inventor Harm van der Hulst

Harm van der Hulst 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).

  • Catalysts for the polymerization of epoxides and process for the preparation of such catalysts
    Patent number: 4477589
    Abstract: Compounds according to formula:M.sup.1.sub.a [M.sup.2 (CN).sub.b (A).sub.c ].sub.d.w M.sup.3 D.sub.e.x H.sub.2 O. y L. z H.sub.n E.sub.m,wherein M.sup.1 represents at least one of Zn(II), Fe(II), Co(II), Ni(ii), Mn(II), Cu(II), Sn(II), or Pb(II); M.sup.2 represents at least one of Fe(II), Fe(III), Co(III), Cr(III), Mn(II), Mn(III), Ir(III), Rh(III), Ru(II), V(IV) or V(V); M.sup.3 represents M.sup.1 and/or M.sup.2 ; A, D and E each represent an anion which may be the same or different; L represents an alcohol, aldehyde, ketone, ether, ester, amide, nitrile or sulphide or mixtures thereof; a and d are numbers to satisfy the valency state of M.sup.1 and M.sup.2 in the double metal cyanide part of the general formula I; b and c are integers (b>c) which together with a and d provide the electroneutrality of the double metal cyanide part of the general formula I; e is an integer satisfying the valency state of M.sup.3 ; n and m are integers satisfying the electroneutrality of HE, andw is a number between 0.
    Type: Grant
    Filed: March 14, 1983
    Date of Patent: October 16, 1984
    Assignee: Shell Oil Company
    Inventors: Harm van der Hulst, George A. Pogany, Jan Kuyper