Patents by Inventor Robert P. Avis

Robert P. Avis 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).

  • Wet-strengthened cellulosic webs
    Patent number: 4557801
    Abstract: Cationic polygalactomannan gums and water soluble wet strength resins containing an amic acid and at least one other ethylenically unsaturated monomer, are useful in the preparation of products having improved, off-machine dry strength and wet strength properties.
    Type: Grant
    Filed: August 20, 1984
    Date of Patent: December 10, 1985
    Assignee: Scott Paper Company
    Inventor: Robert P. Avis
  • Method for increasing wet strength cure rate of paper
    Patent number: 4076581
    Abstract: Wet-lay papermaking processes employing urea-formaldehyde resin in a papermaking slurry for imparting wet strength to the paper, are improved by addition of a water soluble salt of carboxymethylcellulose to the papermaking slurry, preferably when the urea-formaldehyde resin is dispersed in the slurry. The carboxymethylcellulose salt substantially increases the wet strength cure rate of the paper without significantly affecting the ultimate wet strength properties imparted to the paper by the cured urea-formaldehyde resin.
    Type: Grant
    Filed: January 16, 1976
    Date of Patent: February 28, 1978
    Assignee: Scott Paper Company
    Inventor: Robert P. Avis