Patents Examined by Chin: Peter
  • Phenolic compound/polyethylene oxide retention system
    Patent number: 5472570
    Abstract: A paper-making furnish, comprising poly(paravinyl phenol), also known as poly(hydroxy styrene), in admixture with polyethylene oxide, and a process for retaining fine particles in paper-making comprising adding poly(paravinyl phenol) and polyethylene oxide to a paper-making furnish, are disclosed.
    Type: Grant
    Filed: March 24, 1994
    Date of Patent: December 5, 1995
    Assignee: Hercules Incorporated
    Inventor: Elliott Echt