Patents by Inventor Julian Nikolchev

Julian Nikolchev 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).

  • Publication number: 20020100480
    Abstract: The invention provides intrafallopian devices and non-surgical methods for their placement to prevent conception. The efficacy of the device is enhanced by forming the structure at least in part from copper or a copper alloy. The device is anchored within the fallopian tube by imposing a secondary shape on a resilient structure, the secondary shape having a larger cross-section than the fallopian tube. The resilient structure is restrained in a straight configuration and transcervically inserted within the fallopian tube, where it is released. The resilient structure is then restrained by the walls of the fallopian tube, imposing anchoring forces as it tries to resume the secondary shape.
    Type: Application
    Filed: March 28, 2002
    Publication date: August 1, 2002
    Applicant: CONCEPTUS, INC.
    Inventors: Julian Nikolchev, Dai Ton, Amy Thurmond
  • Patent number: 6413228
    Abstract: The invention provides methods, devices and systems for collecting breast ductal fluid comprising cellular material and other useful markers for analysis. The methods typically comprise access of at least one breast duct and collecting materials from that duct separate from all other ducts in the breast. The devices comprise ductal access devices that provide the opportunity to collect fluid from a single duct separate from all the other ducts in the breast. The systems employ the methods and devices that used together provide systems for analysis of a breast condition in a patient specific to accessed breast ducts. The methods, devices and systems are particularly useful for indentification of breast precancer or cancer in patient.
    Type: Grant
    Filed: December 28, 1999
    Date of Patent: July 2, 2002
    Assignee: Pro Duct Health, Inc.
    Inventors: David Hung, Christopher G. M. Ken, Xuanmin He, Phillip M. Olsen, Julian Nikolchev, Shawn O'Leary, Pam Sayavong
  • Patent number: 6391026
    Abstract: Methods, systems, and kits for treating breast tissue rely on transferring energy to or from cells lining an individual breast duct. Energy can be introduced into the breast duct, e.g., by filling the duct with an electrically conductive medium and applying radiofrequency energy to the medium. Other energy forms could also be used, such as light, ultrasound, radiation, microwave energy, heat, cold, direct current, and the like. By treating individual breast ducts, cancerous and pre-cancerous conditions originating in the duct can be effectively treated.
    Type: Grant
    Filed: September 16, 1999
    Date of Patent: May 21, 2002
    Assignee: Pro Duct Health, Inc.
    Inventors: David Hung, Chris Ken, Julian Nikolchev, Susan Love, Shawn O'Leary
  • Publication number: 20020010405
    Abstract: The invention provides methods, devices and systems for collecting breast ductal fluid comprising cellular material and other useful markers for analysis. The methods typically comprise access of at least one breast duct and collecting materials from that duct separate from all other ducts in the breast. The devices comprise ductal access devices that provide the opportunity to collect fluid from a single duct separate from all the other ducts in the breast. The systems employ the methods and devices that used together provide systems for analysis of a breast condition in a patient specific to accessed breast ducts. The methods, devices and systems are particularly useful for indentification of breast precancer or cancer in patient.
    Type: Application
    Filed: July 19, 2001
    Publication date: January 24, 2002
    Inventors: David Hung, Christopher G.M. Ken, Xuanmin He, Phillip M. Olsen, Julian Nikolchev, Shawn O'Leary, Pam Sayavong
  • Publication number: 20020002343
    Abstract: The invention provides methods, devices and systems for collecting breast ductal fluid comprising cellular material and other useful markers for analysis. The methods typically comprise access of at least one breast duct and collecting materials from that duct separate from all other ducts in the breast. The devices comprise ductal access devices that provide the opportunity to collect fluid from a single duct separate from all the other ducts in the breast. The systems employ the methods and devices that used together provide systems for analysis of a breast condition in a patient specific to accessed breast ducts. The methods, devices and systems are particularly useful for indentification of breast precancer or cancer in patient.
    Type: Application
    Filed: July 19, 2001
    Publication date: January 3, 2002
    Inventors: David Hung, Christopher G.M. Ken, Xuanmin He, Phillip M. Olsen, Julian Nikolchev, Shawn O'Leary, Pam Sayavong
  • Patent number: 6328709
    Abstract: Devices, methods and kits for identifying a breast milk duct orifice capable of yielding fluid or releasing a keratin plug under a vacuum are described and claimed. The devices include a magnification lens integral to a nipple aspiration device or a nipple aspiration device having an attachment element for attaching a magnification tool to aid the practitioner to better observe a nipple surface under a vacuum. The devices also can include one or more access ports for such purposes as accessing the duct, marking the duct, or collecting fluid from the duct. The methods of nipple aspiration comprise identifying a duct that yields fluid or releases a keratin plug under a vacuum. The kits can comprise a device of the invention, a container for the kit contents, and instructions.
    Type: Grant
    Filed: November 12, 1999
    Date of Patent: December 11, 2001
    Assignee: Pro Duct Health, Inc.
    Inventors: David Hung, Susan M. Love, Julian Nikolchev, William R. George
  • Patent number: 6176240
    Abstract: The invention provides intrafallopian devices and non-surgical methods for their placement to prevent conception. The efficacy of the device is enhanced by forming the structure at least in part from copper or a copper alloy. The device is anchored within the fallopian tube by imposing a secondary shape on a resilient structure, the secondary shape having a larger cross-section than the fallopian tube. The resilient structure is restrained in a straight configuration and transcervically inserted within the fallopian tube, where it is released. The resilient structure is then restrained by the walls of the fallopian tube, imposing anchoring forces as it tries to resume the secondary shape.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: January 23, 2001
    Assignee: Conceptus, Inc.
    Inventors: Julian Nikolchev, Dai Ton, Amy Thurmond
  • Patent number: 6145505
    Abstract: The invention provides intrafallopian devices and non-surgical methods for their placement to prevent conception. The efficacy of the device is enhanced by forming the structure at least in part from copper or a copper alloy. The device is anchored within the fallopian tube by imposing a secondary shape on a resilient structure, the secondary shape having a larger cross-section than the fallopian tube. The resilient structure is restrained in a straight configuration and transcervically inserted within the fallopian tube, where it is released. The resilient structure is then restrained by the walls of the fallopian tube, imposing anchoring forces as it tries to resume the secondary shape.
    Type: Grant
    Filed: May 28, 1999
    Date of Patent: November 14, 2000
    Assignee: Conceptus, Inc.
    Inventors: Julian Nikolchev, Dai Ton, Amy Thurmond
  • Patent number: 5935056
    Abstract: A method and apparatus are provided for imaging a narrow body lumen, the method comprising maintaining separation between a distal end of an optical viewing scope and a lumen wall with a spacing structure which extends distally from the distal end of an access catheter. Optional spacing structures include distal cages and a guidewire which is fixed to and extends distally from the access catheter body. The invention is particularly beneficial during retrograde imaging of the fallopian tube, as it prevents the tubal wall from coming into such close proximity to a falloposcope as to produce "white-out" on the imaging monitor.
    Type: Grant
    Filed: September 8, 1997
    Date of Patent: August 10, 1999
    Assignee: Conceptus, Inc.
    Inventors: John Kerin, Charles Milo, Julian Nikolchev, James Doty
  • Patent number: 5716321
    Abstract: A method and apparatus are provided for imaging a narrow body lumen, the method comprising maintaining separation between a distal end of an optical viewing scope and a lumen wall with a spacing structure which extends distally from the distal end of an access catheter. Optional spacing structures include distal cages and a guidewire which is fixed to and extends distally from the access catheter body. The invention is particularly beneficial during retrograde imaging of the fallopian tube, as it prevents the tubal wall from coming into such close proximity to a falloposcope as to produce "white-out" on the imaging monitor.
    Type: Grant
    Filed: October 10, 1995
    Date of Patent: February 10, 1998
    Assignee: Conceptus, Inc.
    Inventors: John Kerin, Charles Milo, Julian Nikolchev, James Doty
  • Patent number: 5551443
    Abstract: The present invention sets forth a guidewire-type device which can be axially moved via application of axial force and/or by application of torquing force. The device is used for accessing regions within a body. The device is used to attach to subject material within a body, and, if desired, to remove the subject material. In particular, the device and method of the invention are advantageously utilized by health care practitioners for use in accessing tortuous and difficult body areas, such as fallopian tubes.
    Type: Grant
    Filed: January 21, 1995
    Date of Patent: September 3, 1996
    Assignee: Conceptus, Inc.
    Inventors: Ivan Sepetka, Phong Pham, Dai T. That, Julian Nikolchev