Patents by Inventor Mahlon Robert Derolf

Mahlon Robert Derolf 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).

  • Method for making spherical adsorbent particles
    Patent number: 6074983
    Abstract: The invention is directed to an unsintered spherical adsorbent particle composition having high mechanical strength and controlled pore size distribution, comprising finely divided silica hydrogel particles bonded together with a silica or metal oxide sol.
    Type: Grant
    Filed: December 2, 1998
    Date of Patent: June 13, 2000
    Inventors: Mahlon Robert Derolf, Leonard Harris Smiley, Reinhard Herbert Witt
  • Method for making spherical adsorbent particles
    Patent number: 5998329
    Abstract: The invention is directed to an unsintered spherical adsorbent particle composition having high mechanical strength and controlled pore size distribution, comprising finely divided silica hydrogel particles bonded together with a silica or metal oxide sol.
    Type: Grant
    Filed: June 30, 1997
    Date of Patent: December 7, 1999
    Assignee: Bio-Technical Resources
    Inventors: Mahlon Robert Derolf, Leonard Harris Smiley, Reinhard Herbert Witt
  • Alumina dispersions
    Patent number: 3935023
    Abstract: Stable aqueous dispersions of alumina are formed at concentrations of above about 18% to about 26% on a weight basis by dispersing alumina in a hydrochloric acid solution where the Al.sub.2 O.sub.3 /HCl parts by weight ratio is maintained between 54 and 65 pbw of Al.sub.2 O.sub.3 /l pbw of HCl.
    Type: Grant
    Filed: October 8, 1974
    Date of Patent: January 27, 1976
    Assignee: Philadelphia Quartz Company
    Inventor: Mahlon Robert Derolf