Patents by Inventor John F. Meekins

John F. Meekins 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).

  • Pseudo-random support structure for transmission gratings
    Patent number: 5025464
    Abstract: A transmission grating in which the vertical supports are equidistantly sed from each other in each of the horizontal rows but have their positions relative to each vertical support in all of the other rows determined by a pseudo-random integer of the spacings between the grating wires. As a result, all of the artifacts produced by the vertical supports are eliminated from the diffraction plane.
    Type: Grant
    Filed: March 15, 1990
    Date of Patent: June 18, 1991
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: John F. Meekins
  • Polynomial grating
    Patent number: 4578804
    Abstract: An apparatus for decomposing far ultraviolet and soft X-ray radiation into its component wavelengths comprising a diffraction grating having a diffraction grating surface defined by a polynomial Z=.SIGMA.Q.sub.k X.sup.k and an optimum line spacing.
    Type: Grant
    Filed: May 30, 1984
    Date of Patent: March 25, 1986
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: John F. Meekins, Herbert Gursky
  • Proportional counter end effects eliminator
    Patent number: 3934165
    Abstract: An improved gas-filled proportional counter which includes a resistor netk connected between the anode and cathode at the ends of the counter in order to eliminate "end effects".
    Type: Grant
    Filed: October 25, 1974
    Date of Patent: January 20, 1976
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: John F. Meekins