Patents by Inventor Irving M. Wolbrom

Irving M. Wolbrom 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: 5693273
    Abstract: A method of making dual or multi-porosity porous plastic strips comprising placing a first quantity of plastic granules into a mold, and placing a second or additional quantities of plastic granules into the mold above the first quantity. The particle sizes of each of the quantities of granules placed into the mold are different from the particle sizes of all the other quantities of granules in the mold. The granules are subjected to heat and pressure so as to fuse them together into a self-sustaining porous plastic billet. The billet has a number of fused-together regions corresponding to the number of quantities of granules placed into the mold. The billet is sliced in a direction transverse to the planes containing the interfaces between the regions of the billet so as to create strips, each strip comprising interconnected regions have porosities which differ from one another. The mold may be cylindrical and the strip created by skiving it off the cylindrical surface of the billet.
    Type: Grant
    Filed: September 11, 1995
    Date of Patent: December 2, 1997
    Assignee: Redound Industries, Inc.
    Inventor: Irving M. Wolbrom
  • Patent number: 4963261
    Abstract: A porous structure comprising a macroporous support and a microporous membrane adhered to the outside surface of the support. Each of the support and membrane may be formed of a synthetic polymer, the polymers of the support and membrane usually being different from each other. The structure is formed by placing the membrane and a quantity of heat-fusible particles in contact with each other, and subjecting the membrane and particles to heat and pressure to fuse the particles into a macroporous support. The melting point of the membrane material should be no lower than that of the particle material.
    Type: Grant
    Filed: August 28, 1989
    Date of Patent: October 16, 1990
    Assignee: Chromex Corp.
    Inventors: Gregory Witkowski, Bamdad Bahar, Irving M. Wolbrom
  • Patent number: 4870116
    Abstract: A dye-containing porous plastic element, comprising a plastic body having interconnected capillary passageways, and a dry, water-soluble dye located within the passageways. The passageways extend to at least one surface of the body, and the size of the passageways are such that the body, when contacted with water, can absorb the water to wet the dye and make it soluble. The plastic body comprises fused granules of plastic interspersed with dry granules of dye. The plastic granules may have a diameter, prior to fusion, of between about 50 and 800 microns, preferably between about 100 and 300 microns. The dry dye comprises between about 5 percent and 35 percent of the element, by weight, and preferably between about 10 percent and 20 percent.
    Type: Grant
    Filed: December 19, 1988
    Date of Patent: September 26, 1989
    Inventor: Irving M. Wolbrom
  • Patent number: 4797243
    Abstract: A dye-containing porous plastic element, comprising a plastic body having interconnected capillary passageways, and a dry, water-soluble dye located within the passageways. The passageways extend to at least one surface of the body, and the size of the passageways are such that the body, when contacted with water, can absorb the water to wet the dye and make it soluble. The plastic body comprises fused granules of plastic interspersed with dry granules of dye. The plastic granules may have a diameter, prior to fushion, of between about 50 and 800 microns, preferably between about 100 and 300 microns. The dry dye comprises between about 5 percent and 35 percent of the element, by weight, and preferably between about 10 per cent and 20 percent .
    Type: Grant
    Filed: April 4, 1988
    Date of Patent: January 10, 1989
    Inventor: Irving M. Wolbrom
  • Patent number: D279224
    Type: Grant
    Filed: January 10, 1983
    Date of Patent: June 11, 1985
    Assignee: Presentation Vehicles, Ltd.
    Inventor: Irving M. Wolbrom