Patents by Inventor Kathryn E. Dowlen

Kathryn E. Dowlen 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).

  • Sealant materials for toner cartridges
    Patent number: 6160073
    Abstract: A silicone copolymer for use in an electrophotographic process is disclosed. This composition includes a specifically-defined heat-stable silicone oil-silicone wax copolymer. The copolymer has a melting point such that it is liquid on the hot fuser roll, but solidifies at room temperature on the printed page. A random silicone copolymer, in the form of a paste or pliable caulk, which is useful for sealing leaks in toner cartridges is also disclosed. Finally, the method for preparing these copolymers is disclosed.
    Type: Grant
    Filed: May 14, 1999
    Date of Patent: December 12, 2000
    Assignee: Lexmark International, Inc.
    Inventors: Kathryn E. Dowlen, Bradley L. Beach, Steven A. Curry, Earl D. Ward, II
  • Release agent for electrophotographic process
    Patent number: 6084049
    Abstract: A release agent composition for use in an electrophotographic process is disclosed. This composition includes a specifically-defined heat-stable silicone oil-silicone wax random copolymer. The copolymer has a melting point such that it is liquid on the hot fuser roll, but solidifies at room temperature on the printed page. A random silicone copolymer, in the form of a paste or pliable caulk, which is useful for sealing leaks in toner cartridges is also disclosed. Finally, the method for preparing these copolymers is disclosed.
    Type: Grant
    Filed: May 13, 1997
    Date of Patent: July 4, 2000
    Assignee: Lexmark International, Inc.
    Inventors: Bradley L. Beach, Kathryn E. Dowlen, Terence E. Franey, Douglas C. Hamilton, Gerald G. Leslie, Alexander D. Meade, Jing X. Sun, Peter E. Wallin
  • Release agent for electrophotographic process
    Patent number: 5959056
    Abstract: A release agent composition for use in an electrophotographic process is disclosed. This composition includes a specifically-defined heat-stable silicone oil-silicone wax copolymer. The copolymer has a melting point such that it is liquid on the hot fuser roll, but solidifies at room temperature on the printed page. A random silicone copolymer, in the form of a paste or pliable caulk, which is useful for sealing leaks in toner cartridges is also disclosed. Finally, the method for preparing these copolymers is disclosed.
    Type: Grant
    Filed: September 25, 1997
    Date of Patent: September 28, 1999
    Assignee: Lexmark International, Inc.
    Inventors: Bradley L. Beach, Kathryn E. Dowlen, Terence E. Franey, Douglas C. Hamilton, Gerald G. Leslie, Alexander D. Meade, Jing X. Sun, Peter E. Wallin
  • Sealant materials for toner cartridges
    Patent number: 5952442
    Abstract: A silicone copolymer for use in an electrophotographic process is disclosed. This composition includes a specifically-defined heat-stable silicone oil-silicone wax copolymer. The copolymer has a melting point such that it is liquid on the hot fuser roll, but solidifies at room temperature on the printed page. A random silicone copolymer, in the form of a paste or pliable caulk, which is useful for sealing leaks in toner cartridges is also disclosed. Finally, the method for preparing these copolymers is disclosed.
    Type: Grant
    Filed: September 25, 1997
    Date of Patent: September 14, 1999
    Assignee: Lexmark International, Inc.
    Inventors: Kathryn E. Dowlen, Bradley L. Beach, Steven A. Curry, Earl D. Ward, II
  • Method for making silicone copolymers
    Patent number: 5929186
    Abstract: A release agent composition for use in an electrophotographic process is disclosed. This composition includes a specifically-defined heat-stable silicone oil-silicone wax random copolymer. The copolymer has a melting point such that it is liquid on the hot fuser roll, but solidifies at room temperature on the printed page. A random silicone copolymer, in the form of a paste or pliable caulk, which is useful for sealing leaks in toner cartridges is also disclosed. Finally, the method for preparing these copolymers is disclosed.
    Type: Grant
    Filed: September 25, 1997
    Date of Patent: July 27, 1999
    Assignee: Lexmark International, Inc.
    Inventors: Jing X. Sun, Terence E. Franey, Bradley L. Beach, Kathryn E. Dowlen
  • Method for making silicone copolymers
    Patent number: 5783719
    Abstract: A release agent composition for use in an electrophotographic process is disclosed. This composition includes a specifically-defined heat-stable silicone oil-silicone wax random copolymer. The copolymer has a melting point such that it is liquid on the hot fuser roll, but solidifies at room temperature on the printed page. A random silicone copolymer, in the form of a paste or pliable caulk, which is useful for sealing leaks in toner cartridges is also disclosed. Finally, the method for preparing these copolymers is disclosed.
    Type: Grant
    Filed: May 13, 1997
    Date of Patent: July 21, 1998
    Assignee: Lexmark International, Inc.
    Inventors: Jing X. Sun, Terence E. Franey, Bradley L. Beach, Kathryn E. Dowlen