Patents by Inventor Stephen R. Keyser

Stephen R. Keyser 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).

  • Intravenous catheter with pressure activated valve
    Patent number: 11452858
    Abstract: The anti-back-flow devices and methods prevent fluid from leaking proximally from a catheter, but allow ready access to the catheter using any male luer device. The devices include proximal surfaces that urge open a valve in response to force from a male luer tip. The valves are associated a female luer hub and adapted to function with standard and typical non-standard male luer fittings.
    Type: Grant
    Filed: July 18, 2018
    Date of Patent: September 27, 2022
    Assignee: I-V Access Technology, Inc.
    Inventors: Stephen R. Keyser, Jessie Delgado, Theodore J. Mosler
  • Apparatus for peripheral vascular access
    Patent number: 10828465
    Abstract: This invention provides devices and methods for insertion of a catheter into a vessel. The devices include coaxial slidably mourned needle, dilator and catheter components. The methods include piercing a vessel with the needle component, dilating the pierced hole with the dilator component, retraction of the needle component, insertion of the catheter and withdrawal of the dilator.
    Type: Grant
    Filed: August 23, 2017
    Date of Patent: November 10, 2020
    Assignee: I-V Access Technology, Inc.
    Inventors: Stephen R. Keyser, James E. Miller, III
  • INTRAVENOUS CATHETER WITH PRESSURE ACTIVATED VALVE
    Publication number: 20190038889
    Abstract: The anti-back-flow devices and methods prevent fluid from leaking proximally from a catheter, but allow ready access to the catheter using any male luer device. The devices include proximal surfaces that urge open a valve in response to force from a male luer tip. The valves are associated a female luer hub and adapted to function with standard and typical non-standard male luer fittings.
    Type: Application
    Filed: July 18, 2018
    Publication date: February 7, 2019
    Applicant: I-V Access Technology, Inc.
    Inventors: Stephen R. KEYSER, Jessie DELGADO, Theodore J. MOSLER
  • APPARATUS FOR PERIPHERAL VASCULAR ACCESS
    Publication number: 20180064912
    Abstract: This invention provides devices and methods for insertion of a catheter into a vessel. The devices include coaxial slidably mourned needle, dilator and catheter components. The methods include piercing a vessel with the needle component, dilating the pierced hole with the dilator component, retraction of the needle component, insertion of the catheter and withdrawal of the dilator.
    Type: Application
    Filed: August 23, 2017
    Publication date: March 8, 2018
    Applicant: I-V Access Technology Inc.
    Inventors: Stephen R. KEYSER, James E. MILLER, III
  • Apparatus for peripheral vascular access
    Patent number: 9604035
    Abstract: This invention provides devices and methods for insertion of a catheter into a vessel. The devices include coaxial slidably mounted needle, dilator and catheter components. The methods include piercing a vessel with the needle component, dilating the pierced hole with the dilator component, retraction of the needle component, insertion of the catheter and withdrawal of the dilator.
    Type: Grant
    Filed: May 31, 2016
    Date of Patent: March 28, 2017
    Assignee: I-V Access Technology, Inc.
    Inventors: Stephen R. Keyser, James E. Miller, III
  • APPARATUS FOR PERIPHERAL VASCULAR ACCESS
    Publication number: 20160271370
    Abstract: This invention provides devices and methods for insertion of a catheter into a vessel. The devices include coaxial slidably mounted needle, dilator and catheter components. The methods include piercing a vessel with the needle component, dilating the pierced hole with the dilator component, retraction of the needle component, insertion of the catheter and withdrawal of the dilator.
    Type: Application
    Filed: May 31, 2016
    Publication date: September 22, 2016
    Applicant: I-V Access Technology Inc.
    Inventors: Stephen R. KEYSER, James E. MILLER, III
  • Method and apparatus for severing three dimensional thermoplastic articles
    Patent number: 4844852
    Abstract: Method and apparatus for forming a web of uncut thermoplastic articles from a sheet of material and severing the uncut articles from the web of unseparated articles by precisely locating the unseparated articles with respect to a cutting tool and, once located, cutting the product from the web. Male locating pins included as part of the trimmer and spaced a known distance from the cutting edge move forward to engage web deformations. The forward movement of the male locating pin delivers sufficient force to the deformations to center them on the male locating pin. Continued forward movement forces the other side of the deformation into contact with a female locating pin included as part of the die and spaced the same known distance from the die edge. The female locating pin grabs the deformation to place the sheet in the desired location.
    Type: Grant
    Filed: December 1, 1987
    Date of Patent: July 4, 1989
    Assignee: Mobil Oil Corporation
    Inventors: Stephen R. Keyser, David Vadney