Patents by Inventor Sumner A. Barenberg

Sumner A. Barenberg 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).

  • Recyclable cellulosic packaging material
    Patent number: 5362776
    Abstract: A packaging material composed of cellulosic fiber, a softener, water, and, optionally, a water soluble binder. The biodegradable packaging material is prepared by a process of admixing cellulosic fiber, a softener, water and, optionally, a water soluble binder to form a slurry, and admixing a blowing agent with the slurry to form a pulp. The pulp is formed into a shaped material and dried.
    Type: Grant
    Filed: July 21, 1993
    Date of Patent: November 8, 1994
    Assignee: Packaging Corporation of America
    Inventors: Sumner A. Barenberg, C. Bruce Bradley, Gladys R. Vargas, Samuel C. Conway, Jr.
  • Polyethylene terephthalate molding compositions
    Patent number: 4429067
    Abstract: Use of a selected benzoate oligomer has been found to reduce mold deposits and to lower volatility without impairing crystallization rates of polyethylene terephthalate molding blends which contain an ionic hydrocarbon copolymer or ionic salt of a hydrocarbon acid, over polyethylene terephthalate blends which contained the ionic component and other additives.
    Type: Grant
    Filed: October 27, 1982
    Date of Patent: January 31, 1984
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Sumner A. Barenberg
  • Molding material
    Patent number: 4378444
    Abstract: Use of a selected sulfonamide has been found to reduce mold deposits and to lower volatility without impairing crystallization rates of polyethylene terephthalate molding blend which contains an ionic hydrocarbon copolymer or ionic salt of a hydrocarbon acid, over polyethylene terephthalate blends which contained the ionic component and other additives.
    Type: Grant
    Filed: May 12, 1982
    Date of Patent: March 29, 1983
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Sumner A. Barenberg, Frank P. Gay