Patents by Inventor Peter D. Buikema

Peter D. Buikema 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).

  • Making a lightly oxidized starch additive by adding a cationic polymer to starch slurry prior to heating the slurry
    Patent number: 4146515
    Abstract: Paper and other cellulose materials are sized with a cationic starch prepared by forming an aqueous slurry of a lightly oxidized starch, adding a cationizing agent to the slurry and then heating the slurry in a continuous cooker.
    Type: Grant
    Filed: September 12, 1977
    Date of Patent: March 27, 1979
    Assignee: Nalco Chemical Company
    Inventors: Peter D. Buikema, Thomas Aitken
  • Cationic starch sizing
    Patent number: 4029885
    Abstract: Paper and other cellulose materials are sized with a cationic starch which comprises the reaction product between an anionic starch and a condensate of epichlorohydrin with an equimolar quantity of dimethylamine, in which up to 30% molar ammonia may be substituted for a like molar amount of dimethylamine.
    Type: Grant
    Filed: December 31, 1975
    Date of Patent: June 14, 1977
    Assignee: Nalco Chemical Company
    Inventor: Peter D. Buikema