Patents by Inventor Laurence Rys

Laurence Rys 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).

  • Aqueous compositions and their use in the manufacture of paper and paperboard
    Patent number: 7470346
    Abstract: A process of preparing an aqueous composition comprising a polysilicate, wherein the composition is a substantially uniform liquid when measured at 25° C., comprising the steps of, i) providing an aqueous liquid having a source of silicate, ii) adjusting the pH of the liquid to between about 2 and about 10.5, thereby causing polymerisation of the silicate, iii) allowing sufficient time for the polymerisation to proceed to substantial completion and thereby forming a product comprising gelled material, iv) subjecting the gelled material to sufficient shear to form a substantially uniform liquid. The novel aqueous composition made by this process is useful in the manufacture of paper and paperboard either as a mineral filler or as a retention/drainage aid.
    Type: Grant
    Filed: March 18, 2004
    Date of Patent: December 30, 2008
    Assignee: Ciba Specialty Chemicals Water Treatments Ltd.
    Inventors: Simon Donnelly, Laurence Rys, Philip Ford
  • Aqueous compositions and their use in the manufacture of paper and paperboard
    Publication number: 20060096724
    Abstract: A process of preparing an aqueous composition comprising a polysilicate, wherein the composition is a substantially uniform liquid when measured at 25° C., comprising the steps of, i) providing an aqueous liquid having a source of silicate, ii) adjusting the pH of the liquid to between about 2 and about 10.5, thereby causing polymerisation of the silicate, iii) allowing sufficient time for the polymerisation to proceed to substantial completion and thereby forming a product comprising gelled material, iv) subjecting the gelled material to sufficient shear to form a substantially uniform liquid. The novel aqueous composition made by this process is useful in the manufacture of paper and paperboard either as a mineral filler or as a retention/drainage aid.
    Type: Application
    Filed: March 18, 2004
    Publication date: May 11, 2006
    Inventors: Simon Donnelly, Laurence Rys, Philip Ford