Patents by Inventor Herman Rupert Markert

Herman Rupert Markert 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).

  • Vacuum package with flexible end
    Patent number: 4098404
    Abstract: A vacuum package comprising a composite container of multi-ply paper and foil construction having the contents thereof retained in a vacuum environment, a container rigidifying end cap sealing one end thereof and a flexible tearable membrane sealing the other end with a plastic overcap at the membrane end, said membrane being inwardly flexed by atmospheric pressure against the container contents for a compaction thereof and a corresponding rigidification of the vacuum pack.
    Type: Grant
    Filed: January 27, 1975
    Date of Patent: July 4, 1978
    Assignee: Sonoco Products Company
    Inventor: Herman Rupert Markert
  • End closure for a container
    Patent number: D243833
    Type: Grant
    Filed: December 11, 1975
    Date of Patent: March 29, 1977
    Assignee: Sonoco Products Company
    Inventor: Herman Rupert Markert