Patents by Inventor Donald C. Grigorenko

Donald C. Grigorenko 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: 4801038
    Abstract: An integral tongue is lanced from a steel can top except along a transverse bend line scored on the undersurface of the tongue adjacent to the can top. An arcuate nose portion of a pull tab is riveted to a first portion of the tongue. Opposing shoulders on the tab overlie portions of the can top adjacent to the tongue. A ring or lever portion of the tab is lifted and pivoted on the shoulders, thereby bending the first portion of the tongue under a ribbed second portion. The pull tab is then pivoted in the opposite direction, thereby displacing the entire tongue outwardly relative to the can top along the bend line.
    Type: Grant
    Filed: February 22, 1988
    Date of Patent: January 31, 1989
    Inventor: Donald C. Grigorenko
  • Patent number: 4624386
    Abstract: An easy opening top for a beverage-can is formed by presscutting and bending a comparatively thin sheet steel blank to form therein an included opening underlaid by a correspondingly shaped pull tab or tongue which is joined with the blank along a single bend line. The metal of the blank is stretched and thinned slightly in the area of the bend line to cause at least part of the marginal edge of the tongue or tab to underlie an edge of the blank adjacent the opening therein and thereby prevent accidental displacement of the tongue upwardly through the opening in the can top. A thin film of synthetic resin material is adhesively secured to the underside of the can top in underlying relation to the pull tab and opening, so as to seal the opening shut until the tab is intentionally bent upwardly through the opening to break the seal and provide access to the contents of the can.
    Type: Grant
    Filed: November 18, 1985
    Date of Patent: November 25, 1986
    Inventors: Donald C. Grigorenko, Gerald C. Gardner
  • Patent number: 4446777
    Abstract: A hand-held spit for barbecuing or roasting weiners, sausages, chicken pieces and the like over an open fire includes an elongated metal, strap-like frame which supports a handle at one end thereof and which is formed at its opposite end with an annular loop on which is carried a plurality of quickly detachable, U-shaped, radially extending tines or skewers. The skewers are normally snap-fitted on the loop of the frame, but are easily removed therefrom for cleaning, packaging and/or storage.
    Type: Grant
    Filed: September 28, 1982
    Date of Patent: May 8, 1984
    Inventor: Donald C. Grigorenko
  • Patent number: D276878
    Type: Grant
    Filed: July 1, 1982
    Date of Patent: December 25, 1984
    Inventor: Donald C. Grigorenko