Patents by Inventor Ralph Mitchell

Ralph Mitchell 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: 12599372
    Abstract: This disclosure provides a device and a method for combining a lumbar puncture needle and an ultrasonic density detection circuitry to provide an inexpensive and accurate lumbar puncture locator device. The disclosed device senses different tissue densities with different frequency tones and colored light indicators before needle insertion in the patient's lumbar vertebrae region. This invention allows a doctor, a nurse practitioner or a physician assistant to safely do a lumbar puncture in an office environment without the scheduling of the use of the radiology department. This device will allow a timelier diagnosis of infections (such as Lyme disease, bacterial and viral meningitis, herpes, West Nile virus, syphilis), multiple sclerosis, Alzheimer's dementia, tumors, idiopathic intracranial hypertension, subarachnoid hemorrhage, and others.
    Type: Grant
    Filed: June 27, 2024
    Date of Patent: April 14, 2026
    Inventors: Amber Mitchell, Ralph Mitchell
  • Publication number: 20130266977
    Abstract: Provided herein are methods, test units, systems, assays and kits for qualitative and/or quantitative detection of microorganisms or microbes. Some aspects of the invention utilize a test strip comprising a test area and a self-calibrating control area that permits quantitative measurements to be obtained rapidly at the test site. The test strip is ready-to-use and does not require any preparation. The present systems and methods provide valuable tools for sensitive early detection of microbial contamination.
    Type: Application
    Filed: February 16, 2011
    Publication date: October 10, 2013
    Applicant: PRESIDENT AND FELLOWS OF HARVARD COLLEGE
    Inventors: Ralph Mitchell, Nick Konkol, Christopher J. McNamara, Marc Mittelman, Michael Laine
  • Publication number: 20060074800
    Abstract: A method of insuring military draftees for the reduction of income due to involuntary active military duty includes collecting payments on behalf of a draftee, amounts of the payments being based upon civilian income of the draftee and desired compensatory income during times of active military duty, and providing the desired compensatory income for the draftee during at least a portion of a first time period of active military duty of the draftee in response to receiving a request for compensatory income on behalf of the draftee.
    Type: Application
    Filed: December 17, 2004
    Publication date: April 6, 2006
    Inventor: Ralph Mitchell
  • Publication number: 20050060206
    Abstract: A method of insuring military reserve component personnel for reduction of income due to active military duty includes collecting payments on behalf of a reservist, amounts of the payments being based upon civilian income of the reservist and desired compensatory income during times of active military duty, and providing the desired compensatory income for the reservist during at least a portion of a first time period of active military duty of the reservist in response to receiving a request for compensatory income on behalf of the reservist.
    Type: Application
    Filed: April 6, 2004
    Publication date: March 17, 2005
    Inventor: Ralph Mitchell
  • Patent number: 5809185
    Abstract: A sensor for detecting microorganisms in air, water, or deposited on surfaces. The sensor includes a source of light, a waveguide receptive to the source of light, a fluorochrome coating on the waveguide, and a detector which detects the Stokes shift of light passing through the waveguide in response to microorganisms fluorescing as they come into contact with the fluorochrome coating on the waveguide.
    Type: Grant
    Filed: April 26, 1996
    Date of Patent: September 15, 1998
    Inventor: Ralph Mitchell
  • Patent number: 4220688
    Abstract: Wood is impregnated with a solution of tannic acid followed by impregnation with a solution of a metal in the form of a salt. The metal selected is one that will complex with both the impregnated tannic acid and the wood.
    Type: Grant
    Filed: August 31, 1978
    Date of Patent: September 2, 1980
    Inventors: Ralph Mitchell, Thomas D. Sleeter
  • Patent number: 4001197
    Abstract: A magnetic separation method for recovering single cell protein from single cell organisms including dispersing magnetic seed in a fluid medium containing single cell organisms, to allow the attachment of the seed to the single cell organisms in the mixture to occur; submitting the resulting mixture to a magnetic separator to attract and hold by magnetic forces the seed and attached single cell organisms to concentrate the single cell organisms in the magnetic separator; lysing the entrapped single cell organisms to break the cell walls of the single cell organisms and release protein from the single cell organisms into the fluid medium; and recovering the released protein by discharging the fluid medium from the magnetic separator while the seed and remaining portions of the cells attached to the magnetic seed are held by the magnetic forces.
    Type: Grant
    Filed: June 12, 1975
    Date of Patent: January 4, 1977
    Assignee: Sala Magnetics, Inc.
    Inventors: Ralph Mitchell, Ilan Chet