Patents by Inventor Nigel S. Matthews

Nigel S. Matthews 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).

  • Biocidal compositions and treatments
    Patent number: 5385896
    Abstract: Phosphonium salts such as THP and aldehydes such as formaldehyde exhibit synergistic biocidal activity.
    Type: Grant
    Filed: May 9, 1994
    Date of Patent: January 31, 1995
    Assignee: Albright & Wilson Limited
    Inventors: Edward Bryan, Malcolm A. Veale, Robert E. Talbot, Kenneth G. Cooper, Nigel S. Matthews
  • Method to treat animal skins prior to tanning
    Patent number: 5376142
    Abstract: A method for treating animal skins, prior to tanning including contacting animal skins with an aqueous degreasing solution containing brine and an effective amount of a shrink inhibitor, the shrink inhibitor being(a) at least one hydroxyalkyl phosphine compound of the formula(HORPR.sub.n.sup.1 O.sub.m).sub.x X.sub.ywhereinR is a C.sub.1 -C.sub.24 alkyl or a C.sub.1 -C.sub.24 alkylene;R.sup.1 is a C.sub.1 -C.sub.26 alkyl, a C.sub.1 -C.sub.24 alkenyl or ROH;X is an anion, whereby the hydroxyalkyl phosphine compound is at least sparingly soluble in water;x is a whole number equal to the valency of X;n=2 or 3 and m=0 or 1, whereby (n+m)=2 or 3;y=0 or 1, whereby (n+y)=2 or 4; or(b) a condensate of at least one of the compound (a), the condensate being at least sparingly water-soluble.
    Type: Grant
    Filed: May 21, 1993
    Date of Patent: December 27, 1994
    Assignee: Albright & Wilson Limited
    Inventors: Nigel S. Matthews, Graham R. Lloyd