Patents by Inventor Lauren P. Rand

Lauren P. Rand 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).

  • 12CaO-7AlOelectride hollow cathode
    Patent number: 9552952
    Abstract: The use of the electride form of 12CaO-7Al2O3, or C12A7, as a low work function electron emitter in a hollow cathode discharge apparatus is described. No heater is required to initiate operation of the present cathode, as is necessary for traditional hollow cathode devices. Because C12A7 has a fully oxidized lattice structure, exposure to oxygen does not degrade the electride. The electride was surrounded by a graphite liner since it was found that the C12A7 electride converts to it's eutectic (CA+C3A) form when heated (through natural hollow cathode operation) in a metal tube.
    Type: Grant
    Filed: April 5, 2016
    Date of Patent: January 24, 2017
    Assignee: Colorado State University Research Foundation
    Inventors: Lauren P. Rand, John D. Williams, Rafael A. Martinez
  • 12CaO-7Al2O3 ELECTRIDE HOLLOW CATHODE
    Publication number: 20160217961
    Abstract: The use of the electride form of 12CaO-7Al2O3, or C12A7, as a low work function electron emitter in a hollow cathode discharge apparatus is described. No heater is required to initiate operation of the present cathode, as is necessary for traditional hollow cathode devices. Because C12A7 has a fully oxidized lattice structure, exposure to oxygen does not degrade the electride. The electride was surrounded by a graphite liner since it was found that the C12A7 electride converts to it's eutectic (CA+C3A) form when heated (through natural hollow cathode operation) in a metal tube.
    Type: Application
    Filed: April 5, 2016
    Publication date: July 28, 2016
    Inventors: Lauren P. Rand, John D. Williams, Rafael A. Martinez
  • 12CaO-7Al2O3 electride hollow cathode
    Patent number: 9305733
    Abstract: The use of the electride form of 12CaO-7Al2O3, or C12A7, as a low work function electron emitter in a hollow cathode discharge apparatus is described. No heater is required to initiate operation of the present cathode, as is necessary for traditional hollow cathode devices. Because C12A7 has a fully oxidized lattice structure, exposure to oxygen does not degrade the electride. The electride was surrounded by a graphite liner since it was found that the C12A7 electride converts to it's eutectic (CA+C3A) form when heated (through natural hollow cathode operation) in a metal tube.
    Type: Grant
    Filed: April 28, 2014
    Date of Patent: April 5, 2016
    Assignee: Colorado State University Research Foundation
    Inventors: Lauren P. Rand, John D. Williams, Rafael A. Martinez
  • 12CaO-7Al2O3 ELECTRIDE HOLLOW CATHODE
    Publication number: 20140354138
    Abstract: The use of the electride form of 12CaO-7Al2O3, or C12A7, as a low work function electron emitter in a hollow cathode discharge apparatus is described. No heater is required to initiate operation of the present cathode, as is necessary for traditional hollow cathode devices. Because C12A7 has a fully oxidized lattice structure, exposure to oxygen does not degrade the electride. The electride was surrounded by a graphite liner since it was found that the C12A7 electride converts to it's eutectic (CA+C3A) form when heated (through natural hollow cathode operation) in a metal tube.
    Type: Application
    Filed: April 28, 2014
    Publication date: December 4, 2014
    Inventors: Lauren P. Rand, John D. Williams, Rafael A. Martinez