Patents by Inventor George Gropper

George Gropper 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: 4658571
    Abstract: A method and apparatus for making cleaning pads from a tubular meshed network having inner and outer surfaces and a resilient filler by simultaneously turning said meshed network inside out and feeding said tubular meshed network and said filler into a hollow mandrel whereby said filler is enveloped by the reversed tubular meshed network.
    Type: Grant
    Filed: October 28, 1985
    Date of Patent: April 21, 1987
    Inventor: George Gropper
  • Patent number: 4651505
    Abstract: A method and apparatus for making cleaning pads from a tubular meshed network having inner and outer surfaces and a resilient filler by simultaneously turning said meshed network inside out and feeding said tubular meshed network and said filler into a hollow mandrel whereby said filler is enveloped by the reversed tubular meshed network.
    Type: Grant
    Filed: June 17, 1985
    Date of Patent: March 24, 1987
    Inventor: George Gropper
  • Patent number: 4287633
    Abstract: A flexible and resilient abrading or detergent pad as a cleansing, scouring and smoothing or finishing device having a pervious and knitted outer covering of synthetic yarn and an engaging core of synthetic plastic sponge frictionally biased against the inner surfaces of the covering walls, the transverse edge areas of the covering and core being compressed and integrated for anchorage of the core to the covering. For manufacture, the sponge core is inserted into the sleeve, the assembly compressed and the transverse edge areas of both covering and core while under compression integrated or connected while under further compression at such areas. Trimming of the reduced and integrated or connected edges takes place following said procedures.
    Type: Grant
    Filed: November 19, 1979
    Date of Patent: September 8, 1981
    Inventor: George Gropper