Patents by Inventor Charles A. Rowell

Charles A. Rowell 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: 6376007
    Abstract: A method of marking glass includes providing a glass material with a surface (201) and using a wire (210) to mark the surface. The wire is softer than the glass material and does not damage the surface of the glass material.
    Type: Grant
    Filed: June 1, 2000
    Date of Patent: April 23, 2002
    Assignee: Motorola, Inc.
    Inventors: Charles A. Rowell, David W. Jacobs, Edward A. Zarbock
  • Patent number: 6091190
    Abstract: An electron emitter (121, 221, 321, 421) includes an electron emitter structure (118) having a passivation layer (120, 220, 320, 420) formed thereon. The passivation layer (120, 220, 320, 420) is made from an oxide selected from a group consisting of the oxides of Ba, Ca, Sr, In, Sc, Ti, Ir, Co, Sr, Y, Zr, Ru, Pd, Sn, Lu, Hf, Re, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Th, and combinations thereof. In the preferred embodiment, the electron emitter structure (118) is made from molybdenum, and the passivation layer (120, 220, 320, 420) is made from an emission-enhancing oxide having a work function that is less than the work function of the molybdenum.
    Type: Grant
    Filed: July 28, 1997
    Date of Patent: July 18, 2000
    Assignee: Motorola, Inc.
    Inventors: Babu R. Chalamala, Sung P. Pack, Charles A. Rowell
  • Patent number: 6051924
    Abstract: A field emission device (100, 200) includes a cathode plate (102) having a plurality of electron emitters (532), an anode plate (104) disposed to receive electrons emitted by plurality of electron emitters (532), a frame (109) interposed between cathode plate (102) and anode plate (104) and defining a central opening (112), a mating member (110, 210, 310, 410, 510) coextensive with frame (109) and disposed within central opening (112), and a getter structure (114, 214, 314, 414, 514, 614) mated with mating member (110, 210, 310, 410, 510).
    Type: Grant
    Filed: June 17, 1998
    Date of Patent: April 18, 2000
    Assignee: Motorola, Inc.
    Inventors: Jeffery A. Whalin, Arthur J. Ingle, Charles A. Rowell
  • Patent number: 5961362
    Abstract: A method for in situ cleaning of electron emitters (126, 226, 326, 526) in a field emission device (100, 200, 300, 400, 500) includes the steps of controllably providing hydrogen gas (142, 242, 342, 542) within the field emission device (100, 200, 300, 400, 500) at a time during the operational life of the field emission device (100, 200, 300, 400, 500) and, thereafter, emitting electrons from the electron emitters (126, 226, 326, 526), thereby forming hydrogen free radicals, which decontaminate and condition the emissive surfaces of the electron emitters (126, 226, 326, 526).
    Type: Grant
    Filed: September 9, 1997
    Date of Patent: October 5, 1999
    Assignee: Motorola, Inc.
    Inventors: Babu Chalamala, Arthur J. Ingle, Charles Rowell, Thomas L. Credelle
  • Patent number: 5945780
    Abstract: A field emission display (200) includes a cathode plate (202); a substrate (102) opposing the cathode plate (202); a conductive matrix (104) disposed on the substrate (102) and having via walls (103) defining a plurality of phosphor vias (105); a phosphor (106, 108, 110) disposed within each of the phosphor vias (105); and a gas-adsorption material distributed within the conductive matrix (104). A method for fabricating the field emission display (200) includes the steps of silk-screening onto the substrate (102) a screenable suspension, which is made from a glass, a metal, a gas-adsorption material, and a photo-sensitive material, to form a film; photo-patterning the film to form a phosphor via (105); depositing a phosphor material into the phosphor via (105) to form an anode plate (100); and affixing the cathode plate (202) to the anode plate (100).
    Type: Grant
    Filed: June 30, 1997
    Date of Patent: August 31, 1999
    Assignee: Motorola, Inc.
    Inventors: Arthur J. Ingle, Charles Rowell, Babu Chalamala, Ronald O. Petersen, Craig Amrine, Matthew Stainer
  • Patent number: 5883467
    Abstract: A field emission device (100, 200) includes a cathode plate (110, 210), an anode plate (112, 212) spaced from the cathode plate (110, 210) to define an interspace region (114, 214) therebetween, a hole (144, 244) defined by the device package and in communication with the interspace region (114, 214), and a hydrogen-selective membrane (140, 240) disposed in registration with the hole (144, 244).
    Type: Grant
    Filed: September 9, 1997
    Date of Patent: March 16, 1999
    Assignee: Motorola, Inc.
    Inventors: Babu Chalamala, Arthur J. Ingle, Charles Rowell, Thomas L. Credelle
  • Patent number: 5408088
    Abstract: An improved electrostatically-focused image intensifier tube, and a night vision device having such a tube, is substantially free of the spurious bright spots generally known as "PC Flash". The improved image intensifier tube includes an insulator which resists emission of electrons into the interior cavity of the tube, or a structure to capture such emitted electrons before they can fall into a microchannel plate of the tube and cause the PC Flash. A method of making such an image intensifier tube is also disclosed.
    Type: Grant
    Filed: December 15, 1993
    Date of Patent: April 18, 1995
    Assignee: Litton Systems, Inc.
    Inventors: William A. Chapman, Charles A. Rowell
  • Patent number: 5343623
    Abstract: A knife blade and knife blade assembly are disclosed for cutting food products into sticks or slices without causing surface cracking. The knife blade has a cutting portion defining a cutting edge and is mounted in the knife assembly such that a tension force is exerted on the knife blade in the plane of the cutting edge. The cutting edge of the knife blade is not sharp, but is generally flat and extends between parallel sides of the knife blade. The individual knife blades are formed of stainless steel and are electro-polished to remove any surface defects or sharp edges which may produce stress concentrations. This enables a significant tension force to be applied to the knife blade without diminishing its useful life. The electro-polishing process may also round off the corners of the juncture between the flat cutting edge and the parallel knife blade sides.
    Type: Grant
    Filed: May 11, 1992
    Date of Patent: September 6, 1994
    Assignee: Urschel Laboratories, Inc.
    Inventors: Eugene H. Cole, Charles Rowell