Patents by Inventor John K. Crane

John K. Crane 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).

  • Application of Yb:YAG short pulse laser system
    Patent number: 6760356
    Abstract: A diode pumped, high power (at least 20W), short pulse (up to 2 ps), chirped pulse amplified laser using Yb:YAG as the gain material is employed for material processing. Yb:YAG is used as the gain medium for both a regenerative amplifier and a high power 4-pass amplifier. A single common reflective grating optical device is used to both stretch pulses for amplification purposes and to recompress amplified pulses before being directed to a workpiece.
    Type: Grant
    Filed: April 8, 2002
    Date of Patent: July 6, 2004
    Assignee: The Regents of the University of California
    Inventors: Gaylen V. Erbert, Subrat Biswal, Joseph M. Bartolick, Brent C. Stuart, John K. Crane, Steve Telford, Michael D. Perry
  • Application of Yb:YAG short pulse laser system
    Publication number: 20030189959
    Abstract: A diode pumped, high power (at least 20W), short pulse (up to 2 ps), chirped pulse amplified laser using Yb:YAG as the gain material is employed for material processing. Yb:YAG is used as the gain medium for both a regenerative amplifier and a high power 4-pass amplifier. A single common reflective grating optical device is used to both stretch pulses for amplification purposes and to recompress amplified pulses before being directed to a workpiece.
    Type: Application
    Filed: April 8, 2002
    Publication date: October 9, 2003
    Applicant: The Regents of the University of California
    Inventors: Gaylen V. Erbert, Subrat Biswal, Joseph M. Bartolick, Brent C. Stuart, John K. Crane, Steve Telford, Michael D. Perry
  • Method for isotope enrichment of mercury-196 by selective photoionization
    Patent number: 4793907
    Abstract: A method is provided for selectively photoionizing .sup.196 Hg atoms in a vapor utilizing a three or four-step photoionization process.
    Type: Grant
    Filed: August 20, 1986
    Date of Patent: December 27, 1988
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Jeffrey A. Paisner, John K. Crane