Patents by Inventor Stephen Robert Tremont

Stephen Robert Tremont 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).

  • Dewatering of sludges
    Patent number: 6123856
    Abstract: A sludge, preferably derived at least in part from a paper mill, pulp mill or deinking plant, and which contains at least secondary sludge or primary sludge comprising deinking waste, recycled paper waste or mechanical pulping waste, is flocculated by being mixed with a phenolic material and a polyalkylene oxide and is then subjected to dewatering.
    Type: Grant
    Filed: December 29, 1998
    Date of Patent: September 26, 2000
    Assignee: Ciba Specialty Chemicals Water Treatments Limited
    Inventors: Victor Kumpera, Stephen Robert Tremont
  • Dewatering of aqueous suspensions
    Patent number: 5681480
    Abstract: A mill waste or deinking waste or other suspension containing cellulosic material and hydrophobic material is flocculated by a cationic polymeric flocculant and the flocculated material, is then aggregated by a swelling clay or other anionic colloidal material, optionally further cationic flocculant is added, and the aggregated material is then separated by belt pressing or other pressure filtration as a cake.
    Type: Grant
    Filed: September 22, 1995
    Date of Patent: October 28, 1997
    Assignee: Allied Colloids Limited
    Inventors: John Graham Langley, Philip Anson Ford, Stephen Robert Tremont, Brian Frederic Satterfield