Patents by Inventor Rand G. Jenkins

Rand G. Jenkins 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).

  • On-column injector
    Patent number: 4440550
    Abstract: An apparatus and method for injecting samples into capillary-type gas chromatographic columns allows a portion of the column to be withdrawn from the chromatograph oven prior to injection. The sample is injected into the withdrawn portion of the column which is then inserted back into the oven to initiate volatilization. The apparatus includes a syringe holder which is attached to the inlet end of the column and a collapsible support mechanism for extending the syringe holder away from the chromatograph oven. The sample is injected into the column while the support is extended away from the oven. After the injection is completed, the support is collapsed causing the portion of the column carrying the sample to be abruptly introduced into the oven.
    Type: Grant
    Filed: June 28, 1983
    Date of Patent: April 3, 1984
    Assignee: J & W Scientific, Inc.
    Inventors: Rand G. Jenkins, Norman W. Wohlers
  • Chromatographic on-column injector
    Patent number: D271085
    Type: Grant
    Filed: April 27, 1981
    Date of Patent: October 25, 1983
    Assignee: J & W Scientific, Inc.
    Inventors: Norman W. Wohlers, Rand G. Jenkins
  • Fused silica syringe needle
    Patent number: D273040
    Type: Grant
    Filed: April 23, 1981
    Date of Patent: March 13, 1984
    Assignee: J&W Scientific, Inc.
    Inventors: Rand G. Jenkins, Norman W. Wohlers
  • Precision bore fused silica tubing with tapered section
    Patent number: D274257
    Type: Grant
    Filed: April 24, 1981
    Date of Patent: June 12, 1984
    Assignee: J&W Scientific, Inc.
    Inventors: Rand G. Jenkins, Norman W. Wohlers