Patents by Inventor Heinz H. Spelthann

Heinz H. Spelthann 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).

  • Patent number: 5798413
    Abstract: Polar thermoplastic polyolefin blends are provided which are flexible and are particularly useful in replacing polyvinyl chloride sheeting used as liners, folders, etc. The blends comprise in general, a non-polar thermoplastic polyolefin, a functionalized polar ethylene copolymer, and a functionalized olefin polymer as a compatibilizer, all of which are chlorine-free.
    Type: Grant
    Filed: August 29, 1996
    Date of Patent: August 25, 1998
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Heinz H. Spelthann, Karlheinz Hausmann
  • Patent number: 5610234
    Abstract: Polar thermoplastic polyolefin blends are provided which are flexible and are particularly useful in replacing polyvinyl-chloride sheeting used as liners, folders, etc. The blends comprise, in general, a non-polar thermoplastic polyolefin, a polar ethylene copolymer, and an acid grafted olefin polymer as a compatibilizing agent, all of which are chlorine-free.
    Type: Grant
    Filed: March 21, 1995
    Date of Patent: March 11, 1997
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Heinz H. Spelthann
  • Patent number: 5434217
    Abstract: Polar thermoplastic polyolefin blends are provided which are flexible and are particularly useful in replacing polyvinyl chloride sheeting used as liners, folders, etc. The blends comprise, in general, a non-polar thermoplastic polyolefin, a functionalized polar ethylene copolymer, and a functionalized olefin polymer as a compatibilizing agent, all of which are chlorine-free.
    Type: Grant
    Filed: March 4, 1994
    Date of Patent: July 18, 1995
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Heinz H. Spelthann
  • Patent number: 5395881
    Abstract: Polar thermoplastic polyolefin blends are provided which are flexible and are particularly useful in replacing polyvinyl chloride sheeting used as liners, folders, etc.. The blends comprise, in general, a non-polar thermoplastic polyolefin, a polar ethylene copolymer, an epoxy functionalized polar ethylene copolymer, and a carboxylic acid or anhydride functionalized olefin polymer, all of which are chlorine-free.
    Type: Grant
    Filed: March 4, 1994
    Date of Patent: March 7, 1995
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Heinz H. Spelthann
  • Patent number: H1437
    Abstract: Grafted copolymers are disclosed which contain an acrylic acid ester polymer, vinyl chloride and a copolymer containing units of ethylene, carbon monoxide and n-butyl acrylate; and their use in preparing self-supporting films (sheets) and moulded articles.
    Type: Grant
    Filed: March 4, 1994
    Date of Patent: May 2, 1995
    Inventor: Heinz H. Spelthann