Patents by Inventor Sandford L. Wollman

Sandford L. Wollman 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: 5236121
    Abstract: A textile envelope comprises front and back panels formed of textile material having substantially the same peripheral shape, a sealing flap formed of textile material joined to a peripheral edge of the front panel, and a stiffener element situated between the front and back textile panels for stiffening at least one of the panels. A method of manufacturing a textile envelope includes the steps of situating a stiffener element between front and back panels formed of textile material, connecting overlying side regions of the front and back textile panels to each other, connecting a top region of the stiffener element to a top region of one of the front and back textile panels, and folding a sealing flap formed of textile material joined to a top edge of the front textile panel over the back textile panel.
    Type: Grant
    Filed: June 28, 1991
    Date of Patent: August 17, 1993
    Inventors: Sandford L. Wollman, Lisa L. Wollman
  • Patent number: 4454183
    Abstract: In an elongate strip material which can be severed into lengths to form at least a part of a fastener. The strip material comprises a backing and a multiplicity of lengths of polymeric monofilament having cross sections defining a plurality of radially projecting lobes, each length including a central bight portion secured in the backing, and two stem portions extending from opposite ends of the bight portion and projecting away from the backing. Enlarged heads are formed by heat at the ends of the stem portions opposite the backings, and the heads include hook-like portions spaced from the stem portions and projecting along the stem portions toward the backing that result from heating the ends of the monofilaments because of their lobed cross sections.
    Type: Grant
    Filed: October 20, 1983
    Date of Patent: June 12, 1984
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Sandford L. Wollman