Patents by Inventor Charles N. Campbell

Charles N. Campbell 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: 6576461
    Abstract: An electrochemical affinity assay system for detection of ligand—ligand receptor binding.
    Type: Grant
    Filed: June 18, 2001
    Date of Patent: June 10, 2003
    Assignee: Therasense, Inc.
    Inventors: Adam Heller, Charles N. Campbell
  • Publication number: 20020137193
    Abstract: An electrochemical affinity assay system for detection of ligand-ligand receptor binding.
    Type: Application
    Filed: June 18, 2001
    Publication date: September 26, 2002
    Inventors: Adam Heller , Charles N. Campbell
  • Patent number: 6281006
    Abstract: An electrochemical affinity assay system for detection of ligand—ligand receptor binding.
    Type: Grant
    Filed: August 24, 1998
    Date of Patent: August 28, 2001
    Assignee: Therasense, Inc.
    Inventors: Adam Heller, Charles N. Campbell
  • Patent number: 5616530
    Abstract: Disclosed is a catalyst comprising a porous alumina support bearing 2.5-6 wt % of a non-cobalt Group VIII metal oxide, 14.5-25 wt % of a Group VI-B metal oxide, and 0-4 wt % of a phosphorus oxide, said catalyst having a Total Surface Area of 240-320 M.sup.2 /g, Pore Volume of 0.65-0.90 cc/g, and a Pore Diameter Distribution whereby 50-62.8% of the Total Pore Volume is present as micropores of diameter 55-115 .ANG., 27.5-37% of the Total Pore Volume is present in large pores of a diameter greater than 160 .ANG. and 20-30.5% of the Total Pore Volume is present as macropores of diameter greater than 250 .ANG..
    Type: Grant
    Filed: November 29, 1995
    Date of Patent: April 1, 1997
    Assignee: Texaco Inc.
    Inventors: David E. Sherwood, Jr., Pei-Shing E. Dai, Charles N. Campbell, II
  • Patent number: 5514273
    Abstract: Heavy oils may be hydrotreated in the presence of a porous alumina support bearing metals of Group VIII, excluding cobalt, and VI-B and optionally phosphorus, the catalyst having a Total Surface Area of 240-320 m.sup.2 /g, a Total Pore Volume of 0.65-0.9 cc/g, and a Pore Diameter Distribution whereby 50-62.8% of the Total Pore Volume is present as micropores of diameter 55-115 .ANG. and 20-30.5% of the Total Pore Volume is present as macropores of diameter greater than 250 .ANG..The heavy oils and hydrogen are contacted with the catalyst such that the catalyst is maintained at isothermal conditions and is exposed to a uniform quality of feed. The process is particularly effective in achieving desired levels of hydroconversion of feedstock components having a boiling point greater than 1000.degree. F. to products having a boiling point less than 1000.degree. F.
    Type: Grant
    Filed: October 1, 1993
    Date of Patent: May 7, 1996
    Assignee: Texaco Inc.
    Inventors: David E. Sherwood, Jr., Pei-Shing E. Dai, Charles N. Campbell, II
  • Patent number: 5453411
    Abstract: A mild hydrocracking process for the hydrodemetallation (HDM), hydrodesulfurization (HDS) and hydroconversion (HC) of hydrocarbon feedstocks such as residuum feedstocks which provides increased conversion of the 1000.degree. F.+ hydrocarbon fraction to the 1000.degree. F.- fraction and increased yields of middle distillates is disclosed. The process utilizes a catalyst comprising about 2.0 to about 6.0 wt. % of an oxide of a Group VIII metal, about 12.0 to about 25.0 wt. % of an oxide of molybdenum and 0 to about 3.0 wt. % of an oxide of phosphorus supported on a porous alumina support containing about 4.0 to about 30 wt. % of silica.
    Type: Grant
    Filed: February 22, 1994
    Date of Patent: September 26, 1995
    Assignee: Texaco Inc.
    Inventors: Pei-Shing E. Dai, Charles N. Campbell, II, Bobby R. Martin, Randall H. Petty
  • Patent number: 5436215
    Abstract: A mild hydrocracking process for the hydrodemetallation (HDM), hydrodesulfurization (HDS) and hydroconversion (HC) of hydrocarbon feedstocks such as residuum feedstocks which provides increased conversion and increased yields of middle distillates is disclosed. The process utilizes a catalyst comprising about 1.0 to about 6.0 wt. % of an oxide of a Group VIII metal, about 12.0 to about 25.0 wt. % of an oxide of molybdenum and 0 to about 5.0 wt. % of an oxide of phosphorus supported on a porous alumina support containing about 0.1 to about 10.0 wt. % of lithium oxide.
    Type: Grant
    Filed: December 6, 1993
    Date of Patent: July 25, 1995
    Assignee: Texaco Inc.
    Inventors: Pei-Shing E. Dai, Charles N. Campbell, II, Joseph A. Durkin, David E. Sherwood, Jr.
  • Patent number: 5342507
    Abstract: A mild hydrocracking process for the hydrodemetallation (HDM), hydrodesulfurization (HDS) and hydroconversion (HC) of hydrocarbon feedstocks such as residuum feedstocks which provides increased conversion of heavy hydrocarbons boiling above 1000.degree. F. into products boiling below 1000.degree. F. as well as increased yields of middle distillates is disclosed. The process utilizes a catalyst comprising about 1.0 to about 6.0 wt. % of an oxide of a Group VIII metal, about 12.0 to about 25.0 wt. % of an oxide of molybdenum and 0 to about 5.0 wt. % of an oxide of phosphorus supported on a porous support comprising precipitated alumina or silica-containing alumina and dealuminated Y-zeolite.
    Type: Grant
    Filed: April 16, 1993
    Date of Patent: August 30, 1994
    Assignee: Texaco Inc.
    Inventors: Pei-Shing E. Dai, Charles N. Campbell, II, Bobby R. Martin, David E. Sherwood, Jr.
  • Patent number: 5322616
    Abstract: A mild hydrocracking process for the hydrodemetallation (HDM), hydrodesulfurization (HDS) and hydroconversion (HC) of hydrocarbon feedstocks such as residuum feedstocks which provides increased conversion and increased yields of middle distillates is disclosed. The process utilizes a catalyst comprising about 1.0 to about 6.0 wt. % of an oxide of a Group VIII metal, about 12.0 to about 25.0 wt. % of an oxide of molybdenum and about 0 to about 5.0 wt. % of an oxide of phosphorus supported on a porous alumina support containing about 0.1 to about 10.0 wt. % of lithium oxide.
    Type: Grant
    Filed: March 30, 1992
    Date of Patent: June 21, 1994
    Assignee: Texaco Inc.
    Inventors: Pei-Shing E. Dai, Charles N. Campbell, II, Joseph A. Durkin, David E. Sherwood, Jr.
  • Patent number: 5320743
    Abstract: A mild hydrocracking process for the hydrodemetallation (HDM), hydrodesulfurization (HDS) and hydroconversion (HC) of hydrocarbon feedstocks such as residuum feedstocks which provides increased conversion of the 1000.degree. F.+ hydrocarbon fraction to the 1000.degree. F.- fraction and increased yields of middle distillates is disclosed. The process utilizes a catalyst comprising about 2.0 to about 6.0 wt. % of an oxide of a Group VIII metal, about 12.0 to about 25.0 wt. % of an oxide of molybdenum and 0 to about 3.0 wt. % of an oxide of phosphorus supported on a porous alumina support containing about 4.0 to about 30 wt. % of silica.
    Type: Grant
    Filed: May 29, 1992
    Date of Patent: June 14, 1994
    Assignee: Texaco Inc.
    Inventors: Pei-Shing E. Dai, Charles N. Campbell II, Bobby R. Martin, Randall H. Petty
  • Patent number: 5308472
    Abstract: A mild hydrocracking process for the hydrodemetallation (HDM), hydrodesulfurization (HDS) and hydroconversion (HC) of hydrocarbon feedstocks such as residuum feedstocks which provides increased conversion of heavy hydrocarbons boiling above 1000.degree. F. into products boiling below 1000.degree. F. as well as increased yields of middle distillates is disclosed. The process utilizes a catalyst comprising about 1.0 to about 6.0 wt. % of an oxide of a Group VIII metal, about 12.0 to about 25.0 wt. % of an oxide of molybdenum and 0.1 to about 5.0 wt. % of an oxide of phosphorus supported on a porous support comprising precipitated alumina or silica-containing alumina and hydrogen form, acidified, dealuminated Y-zeolite.
    Type: Grant
    Filed: June 11, 1992
    Date of Patent: May 3, 1994
    Assignee: Texaco Inc.
    Inventors: Pei-Shing E. Dai, Charles N. Campbell, II, Bobby R. Martin, David E. Sherwood, Jr.