Patents by Inventor Panchalam K. Seshan

Panchalam K. Seshan 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).

  • Copper crystallite in carbon molecular sieves for selective oxygen removal
    Patent number: 5219819
    Abstract: Carbon molecular sieves modified by the incorporation of finely divided elemental copper useful for the selective sorption of oxygen at elevated temperatures. The carbon molecular sieves can be regenerated by reduction with hydrogen. The copper modified carbon molecular sieves are prepared by pyrolysis of a mixture of a copper-containing material and polyfurfuryl alcohol to form a sorbent precursor. The sorbent precursors are then heated and reduced to produce copper modified carbon molecular sieves. The copper modified carbon molecular sieves are useful for sorption of all concentrations of oxygen at temperatures up to about 200.degree. C. They are also useful for removal of trace amount of oxygen from gases at temperatures up to about 600.degree. C.
    Type: Grant
    Filed: January 7, 1992
    Date of Patent: June 15, 1993
    Assignee: California Institute of Technology
    Inventors: Pramod K. Sharma, Panchalam K. Seshan
  • Copper modified carbon molecular sieves for selective oxygen removal
    Patent number: 5081097
    Abstract: Carbon molecular sieves modified by the incorporation of finely divided elemental copper useful for the selective sorption of oxygen at elevated temperatures. The carbon molecular sieves can be regenerated by reduction with hydrogen. The copper modified carbon molecular sieves are prepared by pyrolysis of a mixture of a copper-containing material and polyfunctional alcohol to form a sorbent precursor. The sorbent precursors are then heated and reduced to produce copper modified carbon molecular sieves. The copper modified carbon molecular sieves are useful for sorption of all concentrations of oxygen at temperatures up to about 200.degree. C. They are also useful for removal of trace amount of oxygen from gases at temperatures up to about 600.degree. C.
    Type: Grant
    Filed: January 19, 1990
    Date of Patent: January 14, 1992
    Assignee: California Institute of Technology
    Inventors: Pramod K. Sharma, Panchalam K. Seshan